To reduce the cost during operation for gas insulated and metal enclosed switchgear (GIS), it must be changed for the maintenance way from periodic to condition - based.

为减少气体绝缘金属封闭式开关设备（GIS）产品运行期间的成本，必须改变维护方式，即从设备的定期维护改变到状态维护。

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EU. All parties agree it must be changed, but they have not yet been able to settle how.

ECONOMIST: Bosnia ten years on

But it must be changed and changed quickly before any more money is spent on any of these schemes.

FORBES: All High Speed Rail Programs Must be Cancelled and the Numbers Calculated Again

If the new Powell doctrine takes root, it must be asked: At what point will Hamas be considered sufficiently "changed" to qualify along with Abbas as a "partner for peace"?

CENTERFORSECURITYPOLICY: Wishful thinking about Islamist terror