A new nitrogen - producing process with variable pressure absorption 新型变压吸附制氮流程
Infinitely - variable pressure , the hydraulic driving 液压驱动,无级调压
Variable pressure charging system 变压增压系统
Application of variable pressure drop method to steady flow test for port of ic engines 应用变压差技术的气道稳流试验研究
Exhaust gas passage with variable pressure : it is adopted to prevent foul air from toilet and kitchen ; check valve is added at the joint 变压式排风:为防止卫生间、厨房排风井内的污风反窜到室内,排风道采用了变压式排气道,并在封到接口处增设了止回阀。