我们建议采用型号DET膨胀罐，美国瓦茨Governor 80球形旋塞带整体热膨胀安全阀，或一个530C刻度压力安全阀。
We suggest the use of a model DET expansion tank, the Watts Governor 80 ball cock with integral thermal expansion relief valve, or a 530C calibrated pressure relief valve.
球形煤气贮罐是由高强钢制成的且每日都要承受压力循环的容器。
Spherical gas storage tanks are large pressure vessels made of high strength steel and exposed to daily pressure cycle.
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