在线1区 I 99久久免费精品 I 7777精品伊久久久大香线蕉软件的优点 I 国产农村妇女精品一区二区 I 粉嫩av一区二区白浆 I 日本久久高清一区二区三区毛片 I 亚洲欧美日韩久久精品第一区 I 色亚洲一区 I 久久久无码精品一区二区三区 I 天天色天天 I 成熟丰满熟妇xxxxx丰满 I 亚洲黄色高清 I 操碰人人 I 在线播放中文 I 国内极品少妇1000激情啪啪千 I 国产又粗又猛又大爽又黄 I 色网站在线观看视频 I 69堂人成无码免费视频果冻传媒 I 99热这里只有精品3 I 免费看成人毛片 I 97久久精品人人做人人爽 I 成人性生生活性生交5 I 欧美精品一区二区三区一线天视频 I 在线免费视频一区 I 久久免费99精品久久久久久 I 欧洲精品在线观看 I 国产日韩欧美在线一区 I 成人久久久 I 毛片手机在线 I 免费一二区 I 日韩在线观看一区 I 疯狂做受xxxx国产 I 亚洲缚视频在线观看 I 成人爽a毛片 I 在线电影 你懂得 二区

The quality and efficiency in parallel -mechanical pressure riveting and welding

Use the overall pressure riveting process (not play rivet process) for aluminum alloy frame and back plate , strengthening the four corners with aluminum soldering. The back plate is smooth, level off and has good sealing low heat loss, besides,no deformation under the 1000 kg dead load.

The quality and efficiency in parallel - Six sides has thermal insulation and laser welding

Our products adopt six surface heat insulation technology

The quality and efficiency in parallel- Ultra strong laser welding Absorer Technology

*Intensive laser welding plate;

*Unit length density affect the heat transfer performance of the solder joint.

**the industry of laser welds spacing is 5 mm more, ours is 2 mm;