5.2.37附加压力 added pressure resistance due to elevation当燃气管道始末两端存在标高差值时,在管道中产生的额外压力。...8.4.6无压管道闭气试验 pneumatic pressure test for nonpressure pipeline以气体为介质对已敷设管道所做的严密性试验。
solar intelligent tracking system, pv+ products are and will continuously driving technological progress...photovoltaic influencers are a recognition of excellence in photovoltaic industry achievements in the progress