介绍一种简便高效的双阀滤池改造技术.A simple and effective reconstruction technology of the dual - valve filter was introduced.采用双阀机构解决膜吸收过程中膜渗漏问题.The membrane leakage problem is resolved by adopting a dual - valve mechanism during the me...
你的英语学得怎样?How are you getting along with your English studies?我太笨,所以英语学得很慢.I have two left feet so I am slow in learning English.他的英语学得不错, 只是发音还不太好.His English is not bad, but his pronunciation isn't too good....