非压力容器 meaning in English

unpressurized vessel

Manhole closures for unpressurized vessels and process apparatus of nonalloy and stainless steel
非合金钢和不锈钢制非压力容器和工艺装置用人孔盖
Scope of business ： piece of fabrication , processes steel structure ; steel structure project installation ; unnatural ( steel plate ) treating of color ; chemical industry equipment ( be not pressure container ) fabrication
经营范围：钢结构件的制造、加工；钢结构工程的安装；彩板（钢板）的加工；化工设备（非压力容器）的制造。