例句與造句

1. When the system pressure drops to the return pressure , the security valve will be closed and stop discharging , in the way of which the pipelines and equipments of the steam system will be protected
   當(dāng)系統(tǒng)運(yùn)行壓力降低至安全閥的回座壓力時(shí)，主蒸汽安全閥自行關(guān)閉，停止排放，從而對(duì)主蒸汽系統(tǒng)的管道和設(shè)備起安全保護(hù)作用。
2. It's difficult to find return pressure in a sentence. 用return pressure造句挺難的