英语翻译A pneumatic drop with a manual shutoff valve and regulator for the air connection must be installed.

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英语翻译Apneumaticdropwithamanualshutoffvalveandregulatorfortheairconnectionmustbeinstalled.英语翻译Apneumat

英语翻译A pneumatic drop with a manual shutoff valve and regulator for the air connection must be installed.
英语翻译
A pneumatic drop with a manual shutoff valve and regulator for the air connection must be installed.

英语翻译A pneumatic drop with a manual shutoff valve and regulator for the air connection must be installed.
在这里应该是气压的一个泄压或降压装置
直译即:
必须安装带手动关闭阀门的气压降压装置和空气连通的调节器

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