传送带下沉重的钢滚筒the heavy steel rollers under the conveyor belt这个大齿轮带动小齿轮使滚筒旋转.This large gear turns the small one to rotate the cylinder.粉碎辊是波纹式滚筒, 还常是螺旋割纹式.These rolls are corrugated cylinders, usually of the spiral type....
We saw some kids shinning up a drainpipe before legging it clutching a TV and hi-fi.我们看见几个年轻人爬上了排水管，后来就见他们提着一台电视机和音响跑掉了。He evaded police by climbing through a window and shinning down a drainpipe.他翻窗从下水道管子爬下，从而躲过了警察。The ...
My car has had two punctures this week.这个星期我的汽车轮胎被戳破两次.Wear shoes to prevent diseases and protect against cuts and punctures.穿鞋以预防疾病,并避免划伤或刺伤.Where's the doings for mending punctures?补车胎的家伙在什么地方?...