亚洲色情一区二区在线,精品国產理伦女人UV6,九色丝袜视频自拍啪啪,国产精品久久久久无码AV动图,亚洲AⅤ无码日韩AV中文AV伦
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.


一夲道人妻熟女aⅴ深 | 一级a免一级a免做免费线看内裤 | 91精品久久久久久久久无码果冻 | 色欲av伊人久久大香线蕉影院 | 羞羞白丝狂躁喷水Av大片 | 粉色情人国产精品 | 香蕉视频免费在线观看,高潮毛片无遮 | 性一交—乱一性一A片在线播放 | AV大片免费观看 | 西西444www无码视频软 | 欧美性猛交XXX乱大交3 | av免费在线网站 | 蜜桃av鲁一鲁一鲁一鲁俄罗斯的 | 黄色视频网页进入 | 91无码人妻一区二区成人AⅤ | 国产在线观看国产精品产拍 | 国产三级无码在线观看 | 主播探花视频免费在线 | ▓■成人向日葵视频▓免费看 | 亚洲欧美日韩在线 | 丰满人妻久久一区二区三区69 | 黄色三级视频大全 | 中文字幕亚洲无码AV | 777影院理论午夜 | 台湾佬成人娱乐222XXXX | 91久久精品国产91性色也88 | 视频网站在线亚洲免费17c | 亚洲欧美美洲无码精品Ⅴa 色综合久久88色综合天天 | 久久AV无码乱码A片无码 | 91欧美日韩制服 | 男人搡女人搡到高潮视频 | 少妇BBBBBB水多 | 少妇乱淫片免费麻豆 | 搡六十70老女人老熟女视频 | 自慰BBWBBBBB久久偷窥 | 日本三级理伦公与妇 | 国产精品无码免费视频 | 亚洲日韩精品一区二区三区在线观看 | 国产精品探花一区二区 | 国产在线观看无码免费视频 | 精品人妻一区二区三区蜜桃 |