三级理论中文字幕在线播放_国产精品无码制服丝袜_国产成人久久av免费看_成熟丰满熟妇av无码区-后进极品翘臀在线播放中国,久久国产精99精产国

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.


97久久精品人人做人人爱 | 亚洲精品白浆高清久久久久久 | 国产成人精品午夜福利A在线观看 | 丰满人妻少妇久久久久久久久 | 亚洲第一AV无码专区 | 人妻仑乱A级毛片免费看 | 真人免费一级毛片一区二区 | 欧亚激情偷乱人伦小说视频 | 亚洲成AV人黄网站在线观看 | 无码一区二区三区 AV | 人妻熟妇视频一区二区不卡 | 制服丝袜中文字幕无码专区 | 亚洲一区二区观看播放 | 成年免费A级毛片免费看无码 | 亚洲爆乳无码一区二区三区 | 成人动漫精品一区二区三区 | 九九九精品中文字幕蜜桃发布 | 国产精品久久久久永久免费看 | 成人午夜精品网站在线观看 | 国产人成无码视频在线观看 | 国产精品久久亚洲不卡 | 国产人伦精品一区二区三区 | 亚洲一区乱码精品中文字幕 | 亚洲成AV人黄网站在线观看 | 999www人成免费视频 | 国内精品自产拍在线观看91 | 久久精品人妻中文系列 | 亚洲AV成人无码网天堂 | 91精品国产足控福利在线 | 欧美乱大交XXXXX潮喷 | 精品无码一区二区三区蜜臀AV | 综合一区无套内射中文字幕 | 国产一级毛片在线视频 | 亚洲日韩欧美一区二区三区 | 免费播放婬乱男女婬视频国产 | 欧美美女视频网一区日韩色图 | 久久99精品久久久久久女女 | 好大好深好猛好爽视频午夜 | 亚洲AV毛片不卡无码一区 | 中文字幕乱码亚洲无线三区 | 国产精品99精品无码视亚 |