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.


成人爽a毛片一区二区免费 久久精品人妻一区二区三区 | 中文网成人片免费 | 岳胥乱一区二区三区四区视频奖学金的意义 | 在线播放无码高清 | 日韩人妻精品无码 | 国产XXXX揉XXXX| 影视先锋资源共享人妻 | 国产真人亲妺妺A片 | 国产又大又硬又粗又长视频 | 97无码精品人妻一区二区三区麻豆 | 日韩 精品 无码 系列 视频 | 精品视频在线免费观看 | 亚洲色图 校园春色 | 性少妇XXXⅩXXXA片 | 国产精品内射婷婷一级二 | 久久久久久久人妻一区二区三区 | 97人人在线人人操 | 国产精品乱码色情一区二区三区最新版 | 483/C成人在线观看 | 淫荡婷婷色色五月网 | 国产午夜性爱不卡在线视频 | 亚欧免费无码AV在线观看蜜桃 | 日韩亚洲欧美色噜噜噜噜噜片 | 91超漂亮美女口爆吞精 | 成人 免费视频A片视频88p | 亚洲精品在线无码 | 粉嫩av渣男av蜜乳av | 久久精品国产AV | 四川少妇高潮一级毛片 | 成人做爰黄 片视频动漫 | 日本近亲乱伦中文字幕一区 | 蜜桃蜜臀色欲AV在线播放 | 精品无码一区二区三区爱欲九九免费 | 日韩蜜桃人妻一区二区 | 日本韩国三级美妇 | 国产一级免费网站 | 后入翘臀长腿少妇内射 | 亚洲无码精品一区二区三区四区 | 国产午夜精品一区二区三区视频 | 337p日本大胆 | 神马老子午夜噜噜噜噜噜噜 |