国产一级特黄AAA片奶水流,亚洲搡BBBB搡BBBB精工厂,欧美黑人又大又粗毛片5566,17.c-起草国产免费永久网站,波多野结衣乳巨码中文无在线观看
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.


久久国产成人精品 | 狠狠躁夜夜躁人人爽蜜桃臀 | 17c在线无码精品秘 国产三年 | 波多野结衣无码高清中文字幕在线自慰 | 91精品国产乱码久久久ws | 亚洲熟女少妇久久久 | 美女裸体无遮挡啪啪啪啪视频 | 国产看真人毛片爱做A片 | 天天射人人摸2018 | 四川野外少妇极品BBB | 欧美三日本三级少妇99无码视频 | 蜜桃嫩草影院一区欧美 | 少妇的肉体AAAAA免费视频 | AV一卡二卡三卡 | 99久久久成人国产精品 | 无码少妇秘 一区二区 | 强奸乱伦福利导航 | 最新久久无码动漫 | 无码国产精品一区二区免费式直播 | 成人AV电影一区二区亚洲第一 | 亚州无码中文字幕 | 巨黄色的视频在线观看 | 裸体老熟女的AvAv | 无码高清视频在线观看 | 午夜Aa级无码性生活一二三四五六区 | 久久嫩草av一级无码专区 | 国外自拍喷水视频网站 | 99re在线精品| 无码国产精品一区二区三 | 国产视频一区二区在线 | 久久黑人加勒比超 | 国产免费AV片在线无码懂色AV | 东南亚性交内射精品 | av影音先锋资源网站 | 久久久久久久久久一区二区三区 | 激情小短文在线观看 | 4k岛国人妻无码HEYZO | 中文字幕av久久爽Av | 国产免费AV片在线无码懂色AV | 国产精品成人a区久久久 | 色噜噜日日噜狠狠无码秘 |