The air conveyor alarmed when air pressure loss was abnormal or tube blocked, and the feeding to screw electronic weigher was stopped at the same time.

当空气压力损失不正常或管路阻塞时，输送空气压力报警装置自动报警，并停止螺旋电子称供料。

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Shell and tube heat exchanger, screw compressor, and electronic expansion valves are detailed selectioned and designed, and a sewage-source heat pump system is designed for a building of Harbin.

对壳管式换热器、螺杆压缩机、电子膨胀阀进行详细的选型和设计计算，对哈尔滨市某办公楼设计出一套污水源热泵系统。

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Method:40dry atlas specimens were used to measure anatomic data relative to screw placement technique with an electronic digital caliper and a goniometer.

方法：用电子游标卡尺和量角器对40例干燥寰椎标本测量与进钉技术相关的解剖学数据。

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