12周岁女全身裸在线播放_亚洲精品麻豆视频_美国一级毛片aa_了解最新五月天色婷婷_看曰本女人大战黑人视频_国产av自拍一二区_中文字幕黄色不卡视频_日本精品综合亚洲中文_午夜影院一區二區_自拍高清综合亚洲

1. High strength steel plate laser cutting, high precision, reliable and flexible operation
2. Supported by nitrogen spring of rotating shaft, it is labor-saving and light to open and close doors
3. The double-layer high-strength steel armour is provided with an air flow guide hole in the inner steel armour to guide the high-speed air flow when the cylinder is broken, effectively preventing the cylinder fragments from injuring people
4. Inlet closing inflation valve: when the door of explosion-proof inflation box is opened, even if the inflation valve is opened, the gas cylinder will not be inflated. Only when the door is closed can the gas cylinder be inflated to prevent misoperation
5. No matter how high the air source pressure is, the inlet pressure reducing valve can be adjusted to the required working pressure according to the working pressure of the gas cylinder to prevent overpressure of the gas cylinder