发布日期:2021-03-22
A.regulate the fluid flow in either direction
B.restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction
C.allow free movement of hydraulic fluid in both directions
D.allow a restricted fluid flow in one direction only
热门试题
热门资讯
暂无相关推荐~
使用浏览器的分享功能,把这篇文章分享出去
确定