短語(yǔ)詞組短語(yǔ)metric plum grub screw 公制無(wú)頭梅花螺絲hollow grub screw 平頭空心螺釘conical pointed grub screw 錐形沉頭螺釘;錐端無(wú)頭螺釘hexagon socket grub screw 六角凹頭無(wú)頭螺釘grub screw thread 無(wú)頭螺釘螺紋lock grub screw 鎖緊螺絲 返回 grub screw