当压力改变时,阀帽容易上下移动.Bonnet tendency to move up or down as pressure changes.阀帽: 不需要将阀门从管路中拆除,就可以进入维护铰链和阀瓣.Cap: permits access to hinge and disc without removing valve from line.止回阀标签通常安置在阀帽的边缘上.Check valve tags are typically ...
仅仅50毫克的咖啡因就能产生药理效果。As little as 50mg of caffeine can produce pharmacological effects.凭经验估计，一杯过滤咖啡约含80毫克咖啡因。As a rule of thumb, a cup of filter coffee contains about 80mg of caffeine.每次服用大约60毫克，每天最多4次，或遵医嘱。Take approximat...
下降至场压1008毫巴高度900米.Descend to 900 m on QFE 1008.在5毫巴压力下获得了一种碱性盐化合物.At 5 mbar a basic salt was obtained.海平面的大气压力是1013毫巴.Atmospheric pressure at sea level is 1013 millibars....
Well, you know William, always leching after some woman or other.唉, 你是知道威廉这个色鬼的, 他总是拈花惹草.Well, you know Peter, always leching after some woman or other.唉, 你是知道彼得这个人的, 他总是爱拈花惹草....