色欲aⅴ人妻精品一区二区三区,精品国产69久久久久久黄无码臀,熟女人妻久久久一区二区蜜桃老牛,91人妻无码精品一区,精品无码一区二区三区蜜桃承传
0731-82716163

Duct heater

Duct heater

The air duct heater is mainly used for heating the air in the air duct. The specifications are divided into three forms: low temperature, middle temperature, and high temperature. The common feature in the structure is the use of steel plates to support the electric heating tube to reduce the vibration of the electric heating tube when the fan stops. Over-temperature control devices are installed in the junction boxes. The low temperature type can be directly installed on the air duct, and the medium temperature type and high temperature type have a 100mm thick insulation material clamped on the outer wall of the channel to the heater junction box due to the difference in structure. Reduced temperature inside the terminal compartment.


Features:

1. The electric heating tube uses an outer-wound corrugated stainless steel strip, which increases the heat dissipation area and greatly improves the heat exchange efficiency.

2. The design of the heater is reasonable, the wind resistance is small, the heating is uniform, and there is no high or low temperature dead angle.

3. Double protection and good safety performance. A temperature controller and a fuse are installed on the heater, which can be used to control the air temperature in the duct and work under no wind conditions to ensure foolproof.


性欧美Videos做受 | 久久无码一区二区爽 | 小野夕子中文字幕在线 | 国产不卡黄色视频播放 | 久久国产极品欧美精品 | 男捅女下面免费久久久 | 巨黄色的视频在线观看 | 男人天堂6969 | 波多野吉衣无码视频 | 久久精品中文字幕 | 欧美日韩精品久久久免费观看 | 久久久久99精品成人网好色 | 国产欧美日韩在线 | 农村黄艳一级A片 | 点击进入黄色视频网站 | 伊人影院交久影院交 | 亚洲高清无码无毛 | 熟人人妻少妇精品久久 | 内捧疯狂进出免费视频 | 日韩精品1234区 | 成人精品视频免费在线观看 | 亚洲国产精品视频在线最新 | 午夜小视频在线观看 | 国产亚洲精品久久久久动 | 午夜小影院精品久久久 | 91麻豆婷婷成人一二三 | 丰满人妻妇伦又伦精品 | 91久久精品美女高潮…… | 中文字幕亚洲视频在线观看 | 亚洲精品视频免费在线观看 | 中午字幕av影音先锋在线观看 | 无码精品人妻一区二区三区人妻斩 | 欧美日韩精品一二三区咪咪爱 | 国产精品扒开腿做爽爽爽视频 | 亚洲美女乱弄BBBBBB | 国产91精品看黄网站在线观看 | 成年人黄色视频在线观看 | 三上悠亚激情AV一区二区三区 | 国产精品美女久久久久AV爽出奶 | 26uuu俺免费 91在线一区无码 | 亚洲AV无码久久精品国产一区老 |