免费注册 手机版 网站地图 小工具

学而优·知识库

首 页
Where tanks are arranged for either oil or ballast __ must be fitted in the pipe so that only the ballast main or the oil transfer main connected to the tank..
A、aseawaterchest
B、achange-overchest
C、abuffertank
D、athree-wayvalve
参考答案

关闭

前往注册

我已注册,登录账号 继续查看答案