这个控制阀是一个堰式隔膜阀,在流体系统中形成一个堵塞点,需要经常进行维护。
This control valve is a weir diaphragm valve and has created a clogging congestion point in the flow system that requires constant maintenance.
例外的是一个农民组织的抗议,在过去连续三个星期,他们的拖拉机一直堵塞着许多希腊公路,就连希腊和其欧盟邻国保加利亚间接壤点也不放过。
The exception was a protest by farmers, whose tractors have been blocking many Greek highways, and the main border crossing with Greece's EU neighbour Bulgaria, for the past three weeks.
本周,工程队曾试图将一个100吨重的钢制屋形盖置于漏油点上,不过很快,不断积聚的甲烷冰堵塞了该装置,最终以失败告终。
Efforts failed this week to lower a 100-ton steel containment dome onto the leakage site, because quickly accumulated methane hydrates blocked the device.
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