拍精品aⅴ国产精品拍在线_国产欧美剧情一区二区三区_欧美精品一二三区较多收藏_亚洲中文字幕每日更新

General safety requirements for heat treatment operation

Release date: July 31, 2014 reading times: 45

1）Before operation, first of all, be familiar with the heat treatment process and the equipment to be used.

2）During operation, necessary protective articles must be worn, such as work clothes, gloves, protective glasses, etc.

3) Between the heating equipment and the cooling equipment, there shall be no objects that hinder the operation.