例句與造句

1. Spring - loaded variable - head flowmeter
   彈性加載可變壓頭流量計(jì)
2. Variable - head flowmeter
   可變壓頭流量計(jì)
3. Constant - head flowmeter
   恒定壓頭流量計(jì)
4. It's difficult to find head flowmeter in a sentence. 用head flowmeter造句挺難的