例句與造句

1. " countersunk head square neck bolts " ploughshare " type
   商業(yè)性通用螺栓制造.埋頭方頸螺栓
2. Countersunk head square neck bolt
   沉頭方頸螺栓
3. It's difficult to find countersunk head square neck bolt in a sentence. 用countersunk head square neck bolt造句挺難的