看来你没有用过喷灯吧
回复:如果螺丝与螺母的材料有差别,并且螺母热膨胀系数大于螺丝的膨胀系数
所有跟帖:
• why do u think so? -newpeople- ♀ (36 bytes) () 03/28/2012 postreply 16:41:14
• some place, u just can't use it, like place close to gas tank or -newpeople- ♀ (0 bytes) () 03/28/2012 postreply 16:46:18