欧美日韩成人在线影院_亚洲免费在线观看中文字幕_麻豆福利夜间视频_成人免费看片又大_中文字幕欧美手机精品_青青在线看片_久久天天躁日日躁狠狠躁_国产一级黄片一区二区三区_撕开奶罩疯狂揉吮奶头_啊快舒服亚洲视频

簡(jiǎn)體中文版 English

Product List

Product Name: manual air conditioning butterfly valve

Product features: non - sealed manual air control valve, non - sealed valve, manual air control valve purposes. The utility model can be used as a bidirectional opening and closing and regulating device for ventilation and dust removing pipelines, and is suitable for ventilation, dust removing and environmental protection systems in metallurgy, mining, cement, chemical industry and power generation waiting industry. Features: This valve is welded steel plate, short length, light weight, simple structure, easy to use and maintenance, electric field operation and remote control can be achieved. This valve is non sealed valve

Mandatory
Mandatory
Mandatory
Mandatory

Be sure to write clearly consulted or purchase products detailed parameters and quantity.