?圆头槽螺栓
... 圆头槽螺栓 round head grooved bolt 继电器箱,电驿箱 relay box 电阻箱 resistance box ...
?圆头开槽螺栓
圆头开槽螺栓:round head grooved bolt 圆头方颈螺栓:round head square-neck bolt ..
?圆头
... 手圆凿 hand gouge 圆头 cup head; cuphead; fillister head; pommel; pummel; round head grooved bolt; ro ... 锤头凿 hammer head chisel ...
圆头开槽螺栓
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