常見(jiàn)例句The vertical screw shipunloader is voiceless.垂直螺旋卸船機(jī)基本沒(méi)有聲音。This paper introduces the lower bear's improvement of screw grader.文章介紹螺旋分級(jí)機(jī)下部軸承的改造實(shí)踐。 返回 setting screw