There must be no valve between the relief valve and heater.

在安全阀和热水器之间不能够安装任何阀门。

youdao

Pelvic vein is characterized by vein group, has no valve and its construct is weak. It often get change under a lot of facts.

盆腔静脉是一组以静脉丛为特征的静脉血管，没有瓣膜，结构较为薄弱，易受多种因素的影响而发生变化。

youdao

In available technology, there is no valve with controlled opening based on the density of liquid to maintain unchanged liquid density.

现有技术中的阀门不能根据液体的密度变化控制阀的开启状况，从而保持液体的密度不变。

youdao

Valve has released no more details about the mystery project.

BBC: Game maker Valve Software recruits hardware experts

That remains to be seen, of course, as Valve's made no official announcement regarding that project's availability.

ENGADGET

Despite the grapefruit-sized device being on show on both Valve and Xi3's stands at CES no details of its internals have been given.

BBC: Steam 'game console' hardware debuted at CES