plain coil 中文意思是什麼
plain coil
解釋
光線圈-
Hexagon head bolt, single coil spring lock washer and plain washer assemblies
彈簧墊圈和平墊圈組合件 -
Cross recessed small pan head screw, single coil spring lock washer and plain washer assemblies
十字槽小盤頭螺釘和彈簧墊圈及平墊圈組合件
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