variable flow control造句

Takes several energy saving measures for air conditioning system , nick a large capacity centrifugal chillers working with variable frequency nil capacity chillers , variable frequency and variable flow control on secondary pump water systems , cooling tower for four - pipe water system in winter , fan - coil unit for commercial peripheral zones aid all - air systems for interior zones , variable frequency control on supply and exhaust air fain , enthalpy control on fresh air cooling in winter and intermediate season
采用了多项空调节能措施：大冷量离心冷水机组搭配变频小冷量机组，二次泵变频变流量空调水系统，四管制风机盘管冬季用冷却塔换冷供冷设计，商业外区风机盘管、内区全空气空调系统，送风机、排风机变频控制，过渡季、冬季利用室外新风通风降温的焓值控制设计。
It's difficult to find variable flow control in a sentence. 用variable flow control造句挺难的