单词	It is an open secret
释义	It is an open secret. 这是公开的秘密。
随便看	back-pressure manometer backpressure manometre back pressure manometre back pressure multi-effect evaporator back pressure of steam trap back pressure of steam turbine backpressure operation back pressure operation back-pressure operation back pressure pneumatic sensor backpressure porosity back pressure porosity back-pressure regultor back pressure reliefport back pressure relief port back-pressure-relief port backpressure relief valve back pressure relief valve back pressure return back pressure return water backpressure rising backpressures back-pressures backpressure sampling gas line refitment backpressure sealing