A、a compressed packing gland
B、lantern tings between the packing rings
C、a liquid seal
D、the stuffing box gland
更多“Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by （）.”相关的问题
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A、increases the density of the air B、decrease the density of the air C、increases the specific heat of the air D、decreases the specific heat of the exhaust
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