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hand screw 1.手旋螺釘。2.木工用的夾子,夾鉗。

hand shaker

Right hand screw 右旋螺釘

Hand screw press 手動螺旋式沖床

Right - hand screw rule 右手螺旋定則

Theatre engineering , stage directions scenery ; stage - screws , hand screws 劇場工程.舞臺布景方向.舞臺用螺釘和手動螺釘