square neck bolt [机] 方颈螺栓 ; 方镇螺栓
Flat countersink square neck bolts 沉头方颈螺栓 ; 沉头方颈
round head square-neck bolt 圆头方颈螺栓
square neck screw 方颈螺丝
oval head square neck bolt 椭圆头方颈螺栓
cup head square neck bolt 半圆头方颈螺栓
Square-neck 方颈 ; 方领
cup square neck bolt 马车螺栓
countersunk square neck bolt 埋头方颈螺栓
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