单词	anti-siphonage vent
释义	anti-siphonage vent back vent back vent An individual vent for a plumbing fixture located on the downstream (sewer) side of a trap, 1 to protect the trap against siphonage.
随便看	dhbvn dhbw dhc dhc1 dhc1a dhc1b dhc2 dhc3 dhc4 dhc6 dhc7 dhca dhcape dhcat dhcbc dhcc dhcca dhc continus dhccp dhcd dhcdc dhcdd dhce dhced dhcf

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