国产免费一级视频_a高清免费毛片久久_亚洲无码1群2群在线不卡电影_高清无码一级片免费看_中文字幕乱码视频22_真人祼交二十三式视频_国产在线天堂av_国产真实夫妇交换视频_4k岛国无码人妻丿avhd_91在线在线啪永久地址下载

[technology sharing] Common ice melting methods

The common ice melting methods are: water chiller priority supply, ice storage priority supply and limited demand.Water chiller priority supply: water chiller priority supply load system is: chiller a

[technology sharing] Causes of wet stroke of compressor

The wet stroke of compressor, also known as return gas with liquid, is caused by liquid refrigerant entering the cylinder, which belongs to operation accident. The causes are as follows:1. There is to

Xuemei Party committee participated in the first training class of the two new party organization secretaries in the park

The epidemic is not over, don't relax your vigilance!

Novel coronavirus pneumonia confirmed 1840093 cases in Beijing at 6:30 on April 13th, and 113672 cases died.Among them, more than 500000 cases were diagnosed in the United States, ranking first in the

Personnel adjustment notice

Xuemei under the epidemic situation

In early spring, everything in Taizhou recovers and is full of vitality. Under the warm sun, Xuemei is full of energy. At the same time, we should pay attention to the prevention and control of epidem