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.


国产黄A片久久久久毛片 | 国产十八禁久久久久久久 | 中文字幕欧美日韩 | 国产在线视频一区 | 肥熟国产老肥熟女 | 久久亚洲av无码专区首页 | 亚洲精品秘 无码一区二区0 | 24小时在线成人免费视频在线观看 | 久久国产乱子伦精品一区二区小说 | 日韩性爱AV免费观看 | 国产寡妇婬乱A毛片视频 | 国模无码视频一区二区三区哺乳期 | 黄∴色录像一级播放 | 在线碰红桃视频观看 | 99久久精品人妻一区二区三区 | 四季AⅤ无码一区二区 | 日韩AV无码免费 | 激情小视频在线观看 | 亚洲第一在线视频 | 在线免费黄色视频 | 国产寡妇婬乱A毛片视频 | 日本天堂在线视频 | 亚洲国产精品一区二区久久阿宾 | 黄色黄色在线观看 | 欧美日韩国产高清 | 91免费观看视频 | 偷拍区图片区小说区 | 一级毛片国产A级毛片老师 中文日韩欧美一区二区三区 | 精工厂成人 免费网站观观看 | 亚洲无码高清国产精品 | 国产在线拍揄自揄拍无码视频 | 无码一区二区三区999成人精品 | 国产又粗又猛又爽又黄的视频一 | 久久久三级区无码精品 | 成人a片无码免费在线观看 不卡一区二区国产高清视频 | 黄色视频网站入口 | 国产精品自拍第九页 | 国产性爱无码一区二区 | 人人操人人爽高潮喷水 | 无码少妇一区二区三区在线看 | 影音先锋中文字幕在线观看 |