找不到引用UL 1468 BULLETIN-2023 UL Standard for Safety Direct Acting Pressure Reducing and Pressure Restricting Valves 的标准
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Itning金属密封蝶阀Hard Seal Butterfly Valves隔膜阀diaphragm valve旋塞阀plug valve安全阀safety valve管道安全阀Piping Safety Valves回转阀rotary valve减压阀pressure reducing valve减速阀Deceleration valves泄压阀Decompression valves蒸汽疏水阀...
A standard sapphire microwave window in a 7.5 cm aperture is about 2.5 mm thick [16], supporting 2 atm pressure with a safety factor of 2. This would imply a failure pressure of about 4 atm....
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