Better regenerating effect, long operation period and low costs of water handling are characteristics of the method.

两步再生法具有再生效果好、运行周期长、水处理费用低的特点。

youdao

After using that burner, the boiler safety, economic and long period operation were secured further.

改用该燃烧器后，进一步保证了锅炉安全、经济和长周期运行。

youdao

Aim To resolve the problems of long period, complex operation and many steps when determining impure elements in ferrosilicon by classic methods.

目的解决经典化学法测定硅铁中杂质元素周期长、操作复杂、步骤繁琐的问题。

youdao

Once his heart had fully recovered, he would need an operation to determine the extent of the ligament damage, followed by a long period of physical therapy.

NEWYORKER: The Valetudinarian