缝纫机用螺纹
sewing machine (screw) thread
机用螺尖丝锥
spiral pointed machine screw tap
螺钉螺母调整机构
screw adjusting mechanism
埋头机螺钉
countersunk head machine screw
汽油发动机用机油
Mobile Oil for Gasoline Engine
自动钉钉机
automatic nailing machine
自动制螺钉机
automatic bolt-making machine
骨质螺钉用丝攻
tap for cortex bone screw
家具用螺钉
Bolts and nuts for furniture