例句與造句

1. This type of strainer is usually installed upstream of most of the devices in the system including the meters , backflow preventers ( or detector check valves ) and flow alarms , in order to protect these devices from damage caused by large particles
   這種類型的過濾器通常安裝在系統(tǒng)內(nèi)大多數(shù)設(shè)施的上游，包括儀表，防回流閥（或檢測止回閥）和水流警報裝置等，從而保護(hù)這些設(shè)施不會被大顆粒損壞。
2. It's difficult to find detector check valve in a sentence. 用detector check valve造句挺難的