ISO-10303-21; HEADER; FILE_DESCRIPTION (( 'STEP AP203' ), '1' ); FILE_NAME ('Web Model 17805_17806.step', '2021-11-02T20:54:29', ( '' ), ( '' ), 'SwSTEP 2.0', 'SolidWorks 2018', '' ); FILE_SCHEMA (( 'CONFIG_CONTROL_DESIGN' )); ENDSEC; DATA; #1 = PLANE ( 'NONE', #210 ) ; #2 = EDGE_CURVE ( 'NONE', #165, #175, #222, .T. ) ; #3 = APPLICATION_CONTEXT ( 'configuration controlled 3d designs of mechanical parts and assemblies' ) ; #4 = PERSON_AND_ORGANIZATION_ROLE ( 'classification_officer' ) ; #5 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #6 = ORIENTED_EDGE ( 'NONE', *, *, #118, .F. ) ; #7 = EDGE_CURVE ( 'NONE', #33, #165, #194, .T. ) ; #8 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #9 = ORIENTED_EDGE ( 'NONE', *, *, #156, .F. ) ; #10 = LINE ( 'NONE', #11, #139 ) ; #11 = CARTESIAN_POINT ( 'NONE', ( 49.99999999999999289, 49.99999999999999289, 10.00000000000000000 ) ) ; #12 = DIRECTION ( 'NONE', ( -0.000000000000000000, -0.000000000000000000, -1.000000000000000000 ) ) ; #13 = DIRECTION ( 'NONE', ( -0.000000000000000000, -0.000000000000000000, -1.000000000000000000 ) ) ; #14 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 0.000000000000000000 ) ) ; #15 = APPROVAL ( #154, 'UNSPECIFIED' ) ; #16 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 0.000000000000000000 ) ) ; #17 = APPLICATION_CONTEXT ( 'configuration controlled 3d designs of mechanical parts and assemblies' ) ; #18 = VECTOR ( 'NONE', #215, 1000.000000000000000 ) ; #19 = EDGE_CURVE ( 'NONE', #41, #226, #22, .T. ) ; #20 = CARTESIAN_POINT ( 'NONE', ( 0.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #21 = ORIENTED_EDGE ( 'NONE', *, *, #228, .T. ) ; #22 = LINE ( 'NONE', #166, #85 ) ; #23 = ORIENTED_EDGE ( 'NONE', *, *, #153, .T. ) ; #24 = EDGE_CURVE ( 'NONE', #33, #226, #149, .T. ) ; #25 = CALENDAR_DATE ( 2021, 2, 11 ) ; #26 = ORIENTED_EDGE ( 'NONE', *, *, #77, .F. ) ; #27 =( LENGTH_UNIT ( ) NAMED_UNIT ( * ) SI_UNIT ( .MILLI., .METRE. ) ); #28 = DIRECTION ( 'NONE', ( 1.387778780781445676E-16, -1.000000000000000000, 0.000000000000000000 ) ) ; #29 = FACE_OUTER_BOUND ( 'NONE', #155, .T. ) ; #30 = PLANE ( 'NONE', #110 ) ; #31 = COORDINATED_UNIVERSAL_TIME_OFFSET ( 5, 0, .BEHIND. ) ; #32 = CALENDAR_DATE ( 2021, 2, 11 ) ; #33 = VERTEX_POINT ( 'NONE', #47 ) ; #34 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 10.00000000000000000 ) ) ; #35 = FACE_OUTER_BOUND ( 'NONE', #152, .T. ) ; #36 = EDGE_CURVE ( 'NONE', #125, #122, #179, .T. ) ; #37 = APPROVAL_STATUS ( 'not_yet_approved' ) ; #38 = ORIENTED_EDGE ( 'NONE', *, *, #73, .F. ) ; #39 = APPROVAL_STATUS ( 'not_yet_approved' ) ; #40 = COORDINATED_UNIVERSAL_TIME_OFFSET ( 5, 0, .BEHIND. ) ; #41 = VERTEX_POINT ( 'NONE', #81 ) ; #42 = ADVANCED_FACE ( 'NONE', ( #128 ), #83, .F. ) ; #43 = MANIFOLD_SOLID_BREP ( 'Boss-Extrude1', #119 ) ; #44 = CC_DESIGN_APPROVAL ( #191, ( #178 ) ) ; #45 = COORDINATED_UNIVERSAL_TIME_OFFSET ( 5, 0, .BEHIND. ) ; #46 = EDGE_LOOP ( 'NONE', ( #181, #113, #138, #150 ) ) ; #47 = CARTESIAN_POINT ( 'NONE', ( 49.99999999999999289, 49.99999999999999289, 10.00000000000000000 ) ) ; #48 = DIRECTION ( 'NONE', ( 0.000000000000000000, 0.000000000000000000, 1.000000000000000000 ) ) ; #49 = APPROVAL_PERSON_ORGANIZATION ( #204, #191, #199 ) ; #50 = PLANE ( 'NONE', #126 ) ; #51 = APPROVAL_DATE_TIME ( #185, #15 ) ; #52 = EDGE_LOOP ( 'NONE', ( #21, #57, #86, #64 ) ) ; #53 = APPROVAL_ROLE ( '' ) ; #54 = APPROVAL_PERSON_ORGANIZATION ( #97, #15, #53 ) ; #55 = VECTOR ( 'NONE', #13, 1000.000000000000000 ) ; #56 = APPROVAL_DATE_TIME ( #89, #191 ) ; #57 = ORIENTED_EDGE ( 'NONE', *, *, #7, .T. ) ; #58 = CARTESIAN_POINT ( 'NONE', ( -49.99999999999999289, -50.00000000000000711, 10.00000000000000000 ) ) ; #59 = VECTOR ( 'NONE', #198, 1000.000000000000000 ) ; #60 = CARTESIAN_POINT ( 'NONE', ( 49.99999999999999289, 49.99999999999999289, 10.00000000000000000 ) ) ; #61 =( NAMED_UNIT ( * ) PLANE_ANGLE_UNIT ( ) SI_UNIT ( $, .RADIAN. ) ); #62 = CARTESIAN_POINT ( 'NONE', ( 50.00000000000000711, -50.00000000000000711, 10.00000000000000000 ) ) ; #63 = SHAPE_DEFINITION_REPRESENTATION ( #160, #161 ) ; #64 = ORIENTED_EDGE ( 'NONE', *, *, #105, .T. ) ; #65 = CC_DESIGN_PERSON_AND_ORGANIZATION_ASSIGNMENT ( #8, #90, ( #178 ) ) ; #66 = ORIENTED_EDGE ( 'NONE', *, *, #24, .T. ) ; #67 = CC_DESIGN_APPROVAL ( #15, ( #171 ) ) ; #68 = PERSON_AND_ORGANIZATION_ROLE ( 'creator' ) ; #69 = VERTEX_POINT ( 'NONE', #211 ) ; #70 = DIRECTION ( 'NONE', ( 1.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #71 = LOCAL_TIME ( 16, 54, 29.00000000000000000, #31 ) ; #72 = ORIENTED_EDGE ( 'NONE', *, *, #73, .T. ) ; #73 = EDGE_CURVE ( 'NONE', #69, #41, #121, .T. ) ; #74 = ADVANCED_FACE ( 'NONE', ( #170 ), #50, .T. ) ; #75 = VECTOR ( 'NONE', #234, 1000.000000000000000 ) ; #76 = EDGE_LOOP ( 'NONE', ( #221, #133, #172, #72 ) ) ; #77 = EDGE_CURVE ( 'NONE', #122, #41, #189, .T. ) ; #78 = ORIENTED_EDGE ( 'NONE', *, *, #156, .T. ) ; #79 = PLANE ( 'NONE', #202 ) ; #80 = DIRECTION ( 'NONE', ( 0.000000000000000000, 1.000000000000000000, 0.000000000000000000 ) ) ; #81 = CARTESIAN_POINT ( 'NONE', ( 50.00000000000000711, -50.00000000000000711, 0.000000000000000000 ) ) ; #82 = LINE ( 'NONE', #58, #216 ) ; #83 = PLANE ( 'NONE', #169 ) ; #84 = CALENDAR_DATE ( 2021, 2, 11 ) ; #85 = VECTOR ( 'NONE', #168, 1000.000000000000000 ) ; #86 = ORIENTED_EDGE ( 'NONE', *, *, #2, .T. ) ; #87 = DIRECTION ( 'NONE', ( -1.387778780781445676E-16, 1.000000000000000000, 0.000000000000000000 ) ) ; #88 = AXIS2_PLACEMENT_3D ( 'NONE', #147, #80, #167 ) ; #89 = DATE_AND_TIME ( #32, #106 ) ; #90 = PERSON_AND_ORGANIZATION_ROLE ( 'creator' ) ; #91 = SECURITY_CLASSIFICATION_LEVEL ( 'unclassified' ) ; #92 = CALENDAR_DATE ( 2021, 2, 11 ) ; #93 = ORIENTED_EDGE ( 'NONE', *, *, #105, .F. ) ; #94 = CC_DESIGN_DATE_AND_TIME_ASSIGNMENT ( #111, #217, ( #237 ) ) ; #95 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #96 = VECTOR ( 'NONE', #207, 1000.000000000000000 ) ; #97 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #98 = DIRECTION ( 'NONE', ( 0.000000000000000000, -1.000000000000000000, 0.000000000000000000 ) ) ; #99 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 10.00000000000000000 ) ) ; #100 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #101 = LINE ( 'NONE', #214, #75 ) ; #102 = CARTESIAN_POINT ( 'NONE', ( -49.99999999999999289, -50.00000000000000711, 0.000000000000000000 ) ) ; #103 = APPROVAL ( #37, 'UNSPECIFIED' ) ; #104 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 10.00000000000000000 ) ) ; #105 = EDGE_CURVE ( 'NONE', #175, #69, #101, .T. ) ; #106 = LOCAL_TIME ( 16, 54, 29.00000000000000000, #148 ) ; #107 = AXIS2_PLACEMENT_3D ( 'NONE', #131, #48, #70 ) ; #108 = DATE_AND_TIME ( #25, #164 ) ; #109 = ORIENTED_EDGE ( 'NONE', *, *, #7, .F. ) ; #110 = AXIS2_PLACEMENT_3D ( 'NONE', #34, #196, #87 ) ; #111 = DATE_AND_TIME ( #188, #71 ) ; #112 = ORGANIZATION ( 'UNSPECIFIED', 'UNSPECIFIED', '' ) ; #113 = ORIENTED_EDGE ( 'NONE', *, *, #153, .F. ) ; #114 = DIRECTION ( 'NONE', ( -1.000000000000000000, -1.387778780781445676E-16, 0.000000000000000000 ) ) ; #115 = CARTESIAN_POINT ( 'NONE', ( 49.99999999999999289, 49.99999999999999289, 0.000000000000000000 ) ) ; #116 = DIRECTION ( 'NONE', ( 1.387778780781445676E-16, -1.000000000000000000, 0.000000000000000000 ) ) ; #117 = FACE_OUTER_BOUND ( 'NONE', #46, .T. ) ; #118 = EDGE_CURVE ( 'NONE', #165, #125, #197, .T. ) ; #119 = CLOSED_SHELL ( 'NONE', ( #42, #203, #140, #225, #74, #142 ) ) ; #120 = PERSON ( 'UNSPECIFIED', 'UNSPECIFIED', 'UNSPECIFIED', ('UNSPECIFIED'), ('UNSPECIFIED'), ('UNSPECIFIED') ) ; #121 = LINE ( 'NONE', #62, #212 ) ; #122 = VERTEX_POINT ( 'NONE', #102 ) ; #123 = PERSON_AND_ORGANIZATION_ROLE ( 'design_supplier' ) ; #124 = UNCERTAINTY_MEASURE_WITH_UNIT (LENGTH_MEASURE( 1.000000000000000082E-05 ), #27, 'distance_accuracy_value', 'NONE'); #125 = VERTEX_POINT ( 'NONE', #16 ) ; #126 = AXIS2_PLACEMENT_3D ( 'NONE', #233, #151, #195 ) ; #127 = LOCAL_TIME ( 16, 54, 29.00000000000000000, #45 ) ; #128 = FACE_OUTER_BOUND ( 'NONE', #76, .T. ) ; #129 = DIRECTION ( 'NONE', ( 1.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #130 = DIRECTION ( 'NONE', ( -1.387778780781445676E-16, 1.000000000000000000, -0.000000000000000000 ) ) ; #131 = CARTESIAN_POINT ( 'NONE', ( 0.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #132 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #133 = ORIENTED_EDGE ( 'NONE', *, *, #24, .F. ) ; #134 = CC_DESIGN_APPROVAL ( #103, ( #237 ) ) ; #135 = APPLICATION_PROTOCOL_DEFINITION ( 'international standard', 'config_control_design', 1994, #17 ) ; #136 = MECHANICAL_CONTEXT ( 'NONE', #3, 'mechanical' ) ; #137 = LOCAL_TIME ( 16, 54, 29.00000000000000000, #40 ) ; #138 = ORIENTED_EDGE ( 'NONE', *, *, #2, .F. ) ; #139 = VECTOR ( 'NONE', #130, 1000.000000000000000 ) ; #140 = ADVANCED_FACE ( 'NONE', ( #117 ), #30, .F. ) ; #141 = VECTOR ( 'NONE', #163, 1000.000000000000000 ) ; #142 = ADVANCED_FACE ( 'NONE', ( #29 ), #1, .F. ) ; #143 = DIRECTION ( 'NONE', ( -0.000000000000000000, -0.000000000000000000, -1.000000000000000000 ) ) ; #144 = CC_DESIGN_PERSON_AND_ORGANIZATION_ASSIGNMENT ( #132, #123, ( #171 ) ) ; #145 = CC_DESIGN_PERSON_AND_ORGANIZATION_ASSIGNMENT ( #5, #68, ( #171 ) ) ; #146 = PLANE ( 'NONE', #88 ) ; #147 = CARTESIAN_POINT ( 'NONE', ( -49.99999999999999289, -50.00000000000000711, 10.00000000000000000 ) ) ; #148 = COORDINATED_UNIVERSAL_TIME_OFFSET ( 5, 0, .BEHIND. ) ; #149 = LINE ( 'NONE', #60, #55 ) ; #150 = ORIENTED_EDGE ( 'NONE', *, *, #118, .T. ) ; #151 = DIRECTION ( 'NONE', ( -0.000000000000000000, 0.000000000000000000, 1.000000000000000000 ) ) ; #152 = EDGE_LOOP ( 'NONE', ( #78, #6, #109, #66 ) ) ; #153 = EDGE_CURVE ( 'NONE', #175, #122, #82, .T. ) ; #154 = APPROVAL_STATUS ( 'not_yet_approved' ) ; #155 = EDGE_LOOP ( 'NONE', ( #187, #26, #213, #9 ) ) ; #156 = EDGE_CURVE ( 'NONE', #226, #125, #158, .T. ) ; #157 = PRODUCT ( 'Web Model 17805_17806', 'Web Model 17805_17806', '', ( #136 ) ) ; #158 = LINE ( 'NONE', #184, #141 ) ; #159 = CC_DESIGN_PERSON_AND_ORGANIZATION_ASSIGNMENT ( #235, #4, ( #237 ) ) ; #160 = PRODUCT_DEFINITION_SHAPE ( 'NONE', 'NONE', #178 ) ; #161 = ADVANCED_BREP_SHAPE_REPRESENTATION ( 'Web Model 17805_17806', ( #43, #107 ), #183 ) ; #162 = CC_DESIGN_PERSON_AND_ORGANIZATION_ASSIGNMENT ( #95, #177, ( #157 ) ) ; #163 = DIRECTION ( 'NONE', ( -1.000000000000000000, -0.000000000000000000, -0.000000000000000000 ) ) ; #164 = LOCAL_TIME ( 16, 54, 29.00000000000000000, #182 ) ; #165 = VERTEX_POINT ( 'NONE', #205 ) ; #166 = CARTESIAN_POINT ( 'NONE', ( 49.99999999999999289, 49.99999999999999289, 0.000000000000000000 ) ) ; #167 = DIRECTION ( 'NONE', ( 0.000000000000000000, -0.000000000000000000, 1.000000000000000000 ) ) ; #168 = DIRECTION ( 'NONE', ( -1.387778780781445676E-16, 1.000000000000000000, -0.000000000000000000 ) ) ; #169 = AXIS2_PLACEMENT_3D ( 'NONE', #231, #114, #28 ) ; #170 = FACE_OUTER_BOUND ( 'NONE', #52, .T. ) ; #171 = PRODUCT_DEFINITION_FORMATION_WITH_SPECIFIED_SOURCE ( 'ANY', '', #157, .NOT_KNOWN. ) ; #172 = ORIENTED_EDGE ( 'NONE', *, *, #228, .F. ) ; #173 = VECTOR ( 'NONE', #209, 1000.000000000000000 ) ; #174 = CARTESIAN_POINT ( 'NONE', ( -49.99999999999999289, -50.00000000000000711, 0.000000000000000000 ) ) ; #175 = VERTEX_POINT ( 'NONE', #223 ) ; #176 = PRODUCT_RELATED_PRODUCT_CATEGORY ( 'detail', '', ( #157 ) ) ; #177 = PERSON_AND_ORGANIZATION_ROLE ( 'design_owner' ) ; #178 = PRODUCT_DEFINITION ( 'UNKNOWN', '', #171, #192 ) ; #179 = LINE ( 'NONE', #14, #173 ) ; #180 = DATE_TIME_ROLE ( 'creation_date' ) ; #181 = ORIENTED_EDGE ( 'NONE', *, *, #36, .T. ) ; #182 = COORDINATED_UNIVERSAL_TIME_OFFSET ( 5, 0, .BEHIND. ) ; #183 =( GEOMETRIC_REPRESENTATION_CONTEXT ( 3 ) GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT ( ( #124 ) ) GLOBAL_UNIT_ASSIGNED_CONTEXT ( ( #27, #61, #232 ) ) REPRESENTATION_CONTEXT ( 'NONE', 'WORKASPACE' ) ); #184 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 0.000000000000000000 ) ) ; #185 = DATE_AND_TIME ( #92, #137 ) ; #186 = VECTOR ( 'NONE', #116, 1000.000000000000000 ) ; #187 = ORIENTED_EDGE ( 'NONE', *, *, #19, .F. ) ; #188 = CALENDAR_DATE ( 2021, 2, 11 ) ; #189 = LINE ( 'NONE', #174, #59 ) ; #190 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 10.00000000000000000 ) ) ; #191 = APPROVAL ( #39, 'UNSPECIFIED' ) ; #192 = DESIGN_CONTEXT ( 'detailed design', #17, 'design' ) ; #193 = DATE_AND_TIME ( #84, #127 ) ; #194 = LINE ( 'NONE', #190, #96 ) ; #195 = DIRECTION ( 'NONE', ( 1.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #196 = DIRECTION ( 'NONE', ( 1.000000000000000000, 1.387778780781445676E-16, -0.000000000000000000 ) ) ; #197 = LINE ( 'NONE', #104, #18 ) ; #198 = DIRECTION ( 'NONE', ( 1.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #199 = APPROVAL_ROLE ( '' ) ; #200 = CC_DESIGN_DATE_AND_TIME_ASSIGNMENT ( #193, #180, ( #178 ) ) ; #201 = APPLICATION_PROTOCOL_DEFINITION ( 'international standard', 'config_control_design', 1994, #3 ) ; #202 = AXIS2_PLACEMENT_3D ( 'NONE', #206, #98, #227 ) ; #203 = ADVANCED_FACE ( 'NONE', ( #35 ), #79, .F. ) ; #204 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #205 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 10.00000000000000000 ) ) ; #206 = CARTESIAN_POINT ( 'NONE', ( -50.00000000000000711, 49.99999999999999289, 10.00000000000000000 ) ) ; #207 = DIRECTION ( 'NONE', ( -1.000000000000000000, -0.000000000000000000, -0.000000000000000000 ) ) ; #208 = EDGE_LOOP ( 'NONE', ( #236, #38, #93, #23 ) ) ; #209 = DIRECTION ( 'NONE', ( 1.387778780781445676E-16, -1.000000000000000000, 0.000000000000000000 ) ) ; #210 = AXIS2_PLACEMENT_3D ( 'NONE', #20, #229, #129 ) ; #211 = CARTESIAN_POINT ( 'NONE', ( 50.00000000000000711, -50.00000000000000711, 10.00000000000000000 ) ) ; #212 = VECTOR ( 'NONE', #12, 1000.000000000000000 ) ; #213 = ORIENTED_EDGE ( 'NONE', *, *, #36, .F. ) ; #214 = CARTESIAN_POINT ( 'NONE', ( -49.99999999999999289, -50.00000000000000711, 10.00000000000000000 ) ) ; #215 = DIRECTION ( 'NONE', ( -0.000000000000000000, -0.000000000000000000, -1.000000000000000000 ) ) ; #216 = VECTOR ( 'NONE', #143, 1000.000000000000000 ) ; #217 = DATE_TIME_ROLE ( 'classification_date' ) ; #218 = APPROVAL_ROLE ( '' ) ; #219 = APPROVAL_PERSON_ORGANIZATION ( #100, #103, #218 ) ; #220 = FACE_OUTER_BOUND ( 'NONE', #208, .T. ) ; #221 = ORIENTED_EDGE ( 'NONE', *, *, #19, .T. ) ; #222 = LINE ( 'NONE', #99, #186 ) ; #223 = CARTESIAN_POINT ( 'NONE', ( -49.99999999999999289, -50.00000000000000711, 10.00000000000000000 ) ) ; #224 = APPROVAL_DATE_TIME ( #108, #103 ) ; #225 = ADVANCED_FACE ( 'NONE', ( #220 ), #146, .F. ) ; #226 = VERTEX_POINT ( 'NONE', #115 ) ; #227 = DIRECTION ( 'NONE', ( 0.000000000000000000, -0.000000000000000000, -1.000000000000000000 ) ) ; #228 = EDGE_CURVE ( 'NONE', #69, #33, #10, .T. ) ; #229 = DIRECTION ( 'NONE', ( -0.000000000000000000, 0.000000000000000000, 1.000000000000000000 ) ) ; #230 = CC_DESIGN_SECURITY_CLASSIFICATION ( #237, ( #171 ) ) ; #231 = CARTESIAN_POINT ( 'NONE', ( 49.99999999999999289, 49.99999999999999289, 10.00000000000000000 ) ) ; #232 =( NAMED_UNIT ( * ) SI_UNIT ( $, .STERADIAN. ) SOLID_ANGLE_UNIT ( ) ); #233 = CARTESIAN_POINT ( 'NONE', ( 0.000000000000000000, 0.000000000000000000, 10.00000000000000000 ) ) ; #234 = DIRECTION ( 'NONE', ( 1.000000000000000000, 0.000000000000000000, 0.000000000000000000 ) ) ; #235 = PERSON_AND_ORGANIZATION ( #120, #112 ) ; #236 = ORIENTED_EDGE ( 'NONE', *, *, #77, .T. ) ; #237 = SECURITY_CLASSIFICATION ( '', '', #91 ) ; ENDSEC; END-ISO-10303-21;