单词	rising main
释义	Rising main (Waterworks) the pipe through which water from an engine is delivered to an elevated reservoir. See also: Rising rising main riser riser, 1 1. The vertical face of a stair step. 2. Any upright face, as of a seat, platform, etc. 3. A platform on the stage of a theater or concert hall on which a performer is placed. 4. A water-supply, drainage, gas, steam, or vent pipe which extends vertically, one full story or more, to service several branches or a group of fixtures. 5. An electrical cable which extends vertically, one full story or more, to distribute electrical power to electric panels on the different floors of a building. 6. A duct, which extends vertically, one full story or more, to distribute air to branch ducts on the different floors of a building. 7. A vertical supply pipe for a fire sprinkler system. ThesaurusSeeriser
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