不能装反
Cannot be reversed
以上为机器翻译结果，长、整句建议使用 人工翻译 。
应当注意，出口止回阀不能装反或出现卡死现象。
It should be noted that the outlet check valve cannot be installed backwards or stuck.
youdao
It should be noted that exports can not check valve or a card with the anti-death phenomenon.
应用推荐
模块上移
模块下移
不移动