double iron pulley block
[纺织英汉词典]
double iron pulley blockn.双轮铁滑车
是什么意思,double iron pulley block的解释,double iron pulley block的翻译
double iron pulley block
[纺织英汉词典]
double iron pulley block是什么意思,double iron pulley block的解释,double iron pulley block的翻译