There needs no adjustment within working pressure, excellent, excellent abilities to save energy.
在工作压力范围内,无需调整,节能效果显著。
Adopting this plan, it needs not to change beamwidth and there needs no common optical sys-tem for receiving and transmitting.
此方案无须要求通信系统具有能实现宽窄波束变换的光学系统,也不用预先解决收发天线共用的问题。
Using this new technology, there needs no the second tensioning of the prestressing tendons and temporary braces, thus the construction period and cost can be cut down obviously.
该改造工程不需要对预应力钢筋二次张拉和对结构进行临时支撑,因而明显地缩短了施工周期并节省了工程费用。
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