白浆高潮一区二区三区九色,91无码精品国产视频,懂色av一区二区三区,亚洲精品一区二区二二三区,亚洲va欧洲va国产va不卡
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.


波多野结衣035 | 亚洲精品久久久蜜桃 | 性少妇XXXX另类 | 97成人资源总站 | 偷窥自拍9999 | 黄色视频成人影片 | 99re国产精品 | 91在线无码精品秘 国产色多多 | av一区二区三区在线观看 探花 | 国产av一区二区精品久久 | 亚洲天堂中文字幕 | 国产伦精品一区二区三区熟妇 | jiujiure一级在线只有精品 | www.精品一区| 亚洲无码在线免费视频 | 日韩AV资源网站 | 国产精品成人一区二区无码久久 | avav我爱av| 国产三级片儿视频大全 | 狠狠色综合7777久影视 | 国产高清无码不卡 | 亚洲精品一区二区三区中文字幕 | 波多野结衣乳巨码无在线观看波 | 成人免费视频手机在线观看 | 免费观看黄色在线网址 | 无码人妻一区二区三区免费n狂飙 | 亚洲精品一区国产 | www免费黄色网 | 欧美性爱在线视频 | 日韩精品无码人妻一区二区三区 | 欧洲美女走乱又轮 | 欧美日本在线免费视频一区二区 | 久久久久久无码人妻一区 | 国产高潮又爽又黄的九色真实 | 东北少妇大叫高潮XXXⅩ传媒 | 免费一级特黄网站 | 三上悠亚中文字幕在线观看 | 中文字幕在线视频免费 | 国产mv欧美mv日产mv免费 | 又国产+又黄+无码 | 久久精品免费一区二区喷喷喷 |