Graphic symbols for circulation line 运行线路图形符号
natural circulation line 自然循环管
low-flow circulation line 无流量管路
top line circulation 顶线循环
A flexible hose should be provided to flush the circulation line with city water, in case of a power cut.
应提供一个软管以便在断电时用自来水冲洗循环管路。
Solar hot water system mainly components including collector, storage device and the circulation line three parts.
太阳能热水系统主要元件包括收集器、储存装置及循环管路三部分。
Total paid circulation is gone as the top-line measure.
以前最主要的评定办法总计购买发行量已经过时了。
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