The main reason of this is some system and trandom errors existing mainly in processing system.

究其原因，多为加工系统所存在的某些系统性和随机性误差。

youdao

The problem lies mainly in processing technique as well as moisture absorbing caused by improper installation.

出现这些现象的主要原因是地板生产工艺问题、安装不当导致二次吸湿等。

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In practice, they provide cheap Labour (mainly from Asia) for the garment industry, farming and fish-processing.

实际上，它们为服装工业、农业和鱼类加工业提供了廉价劳动力(主要来自亚洲)。

youdao

The company, which focuses mainly on processing steel for use in the enterprise, saw its stock move up nearly 4% after hours.

FORBES: After Hours: Verifone Offers Bid For Competitor

In practice, they provide cheap labour (mainly from Asia) for the garment industry, farming and fish-processing.

ECONOMIST: Japanese immigration