gravity tank meaning in English

竿力供油油箱
高位槽
高位罐
重力供料箱
重力柜
重力水箱
重力送料槽
重力油箱
自流贮罐

2 ) a simplified sprinkler system which is composed of water source , pipeline pump , pipes , current of water display , nozzle , contral valve , is suitable for our country . and its water is supplied by gravity tank or gravity tank or hydrant system or city 3 ) spray intensity of simplified sprinkler system is 3 l / min . m2 , protection area of them is 50m2
3 )简易自动喷水灭火系统的喷水强度为3 / min . m2 、保护面积为50m2 、喷头的安装间距为3 . 7m等参数。 4 )简易自动喷水灭火系统最大设计动作喷头数为四只,供水时间宜为30min等。