动漫美女被爆羞羞免费_国产免费久久久久久无码_情侣视频精品免费的国产_男女性潮高清免费网站

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.