drain line

基本解释

A proper drain line connected to the valve outlet and run to a safe place of disposal must be installed.
必须安装一个适当的排泄管道，连接阀门的出水口，并且流向安全的地方。
The next day, Michael tells Abruzzi he needs help getting a bottle of drain line root control. “Sooner than later.”
第二天，Michael告诉Abruzzi他需要他帮忙搞一瓶下水道除草剂，“越快越好”。
A drain line should be attached to the relief valve to channel any potential discharge to a safe place of disposal.
在安全阀上应该连接排水管道，将任何可能的排放引导到安全的处置地方。