水晶屯金矿床位于张宣幔枝构造轴部，水泉沟—大南山碱性角闪二长岩杂岩体的西缘。
Shuijingtun gold deposit is located in the central axis of the Zhanjiakou-Xuanhua mantle branch and in the west of alkaline hornblende monzonite in the area of Shuiquangou-Dananshan in Zhangjiakou.
第二便是改变喷气引擎的基本构造，使用三个轴代替两个轴。
The second was to change the basic architecture of jet engines by using three shafts instead of two.
离心泵的基本构造是由六部分组成的，分别是：叶轮，泵体，泵轴，轴承，密封环，填料函。
Basic structure of the centrifugal pump is composed of six parts, namely: impeller, pump, pump shaft, bearing, seal ring, stuffing box.
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