There was also passage of the Clean Water Act and the Clean Air Act was strengthened.
《清洁水法》也通过了，并且《清洁空气法》也得到了支持。
Plastic rockery stone stability is mainly rely on the main structure completed, but with the passage of time, steel in the process of contact with air and water, prone to corrosion and rust.
塑石假山的稳定性主要靠主结构来完成，但随着时间的推移，钢材在接触空气及水的过程中，容易发生腐蚀、生锈。
The reserved water in the dump bucket obstructs return air in an excrement passage.
翻斗里的存水隔断了粪便通道的回气。
The utility model discloses a rotary drum type sulfur flaker, comprising a drum, a cooling water passage, a sulfur level controller, an air exhausting hood, a liquor sulfur pot and a shaver welded.
本实用新型公开了一种转鼓式硫磺结片机，它由焊制而成的转鼓、冷却水通道、硫磺液面控制器、排气罩、液硫锅、刮刀组成。
A short passage of return pipe on the water discharge pipe may be placed to prevent outside air into evaporator and facilitate the outflow of condensate.
在排水管路上设一小迂回管段，可防止外界空气进入蒸发器内并有利于冷凝水排出。
A short passage of return pipe on the water discharge pipe may be placed to prevent outside air into evaporator and facilitate the outflow of condensate.
在排水管路上设一小迂回管段，可防止外界空气进入蒸发器内并有利于冷凝水排出。
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