心脏、血管和淋巴管互相连通，共同组成一套密闭的管道系统。
The heart, blood vessels and lymph vessels connect to form a set of closed pipe system.
最后，利用以上研究的驱动系统和永磁同步电机，实际组成一套电梯拖动系统。
At last, based on the research of the machine and driving system, compose a elevator driving system.
由二套BIA机械密封背靠背安装，共用一个弹簧可组成一套双端面机械密封型式。
Two sets of back-to-back assembled mechanical seal BIA, and together with a Shared spring can form a double mechanical seal.
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