The comparison of manual sampling and mechanical sampling of coal has been carried out.

对发电厂入厂煤人工采样和机械采样的化验结果进行了对比。

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Attentions and solutions were put forward in this paper according to some practical problems in manual sampling, mechanical sampling, sample preparation and analysis, etc.

针对燃煤电厂在人工采样、机械化采样、制样和化验等方面的一些实际问题，提出了应注意的事项及解决办法。

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Now, most of Chinese bearing factories in dimension measurement for bearing have been mainly dependent on mechanical or optical instruments in sampling inspection way.

目前，我国大多数轴承生产厂家在轴承尺寸检测方面还是依靠机械式、光学式等测量仪器，采用抽检方式进行。

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