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汉语拼音：hé huán

1.犹周围。

1. 犹周围。

   唐 杜牧 《感怀诗》：“合环千里疆，争为一家事。”参见“ 周围 ”。

• The results of stress determination and bursting test of analogue DSR high pressure vessels are in accord with that of calculation.

  多个模拟的双合环高压容器的应力测定和爆破实验的结果与用本计算方法的计算结果是一致的。

• Q is a piperidine or piperazine ring that can have a bridge or a fused ring.

  Q为哌啶或哌嗪环，其可具有桥基或稠合环。

• All-Sided Enhancement of Reliability of Dispatching Power Supply in Distribution Network Combined Loop in Rural Area

  全面实现农村配网合环调电提高供电可靠性

• Synthesis on Novel Bridged Amidinate-diamido and Annular Diaminocyclohexane

  新型桥联双氨基脒基与环合环己二胺的合成

• Power flow analysis of closing interconnection switches for weakly meshed networks in regional grid

  地区弱电磁环网合环潮流探讨

• Approximate Flow Calculation during Closed Loop Operation in Local Electric Network

  地区电网合环操作的潮流近似计算

• Study on Closed Loop Current and its Calculation Method in Yinchuan 10 kV Distribution Network

  银川地区10kV配电网合环电流及计算方法的研究

• Cause Analysis and Improvement Measures for Failure Closing of a 220 kV Line

  一条220kV线路合环失败的原因分析及改进

• Problems on Relay Protection in Changing Open-loop to Close-loop Operation in Load Substation

  负荷变电站开环改合环运行继电保护问题