Four pins means you can have four sensors, say two temperature sensors, one for ambient and the other for panel temperature, a light sensor, and a wind speed sensor.
四个插脚意味着可以有四个传感器，比如两个温度传感器(一个用于外界温度，一个用于面板温度)、一个光传感器和一个风速传感器。
The boys played circus for three days afterward in tents made of rag carpeting—admission, three pins for boys, two for girls—and then circusing was abandoned.
从那以后，孩子们用破毯子搭起一个帐篷，一连玩了三天的马戏——入场券是：男孩子要三根别针，女孩子要两根——不久，马戏也不玩了。
This paper offers the probabilistic design for the jig of machine tools locating with one plane and two pins and presents calculating examples and makes computerized simulation.
本文提供了机床夹具一面两销定位的概率设计法，给出了计算示例，并进行了计算机模拟。
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