The most important thing is to understand the rules of mahjong, card type can and know how to, understand the basic operation.
最重要的就是要了解麻将的规则，知道怎样的牌型能和，懂得基本的操作。
The basic operation principle and settlement of the key technology of the verification system of the error of indication for grating type of length measuring instrument are described in this paper.
介绍了光栅式长度仪表示值误差检定系统的基本工作原理以及关键技术的解决。
A brief description of the basic construction, function and operation of this type of burner is given.
本文就其基本结构、工作原理和操作情况等作简要介绍。
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