91久久精品国产91久久性色也,一区二区在线视频观看,男女操操视频,欧美日韩无线在码不卡一区二区三区,日韩电影一区,暖暖视频在线播放,亚洲欧美在线中文字幕不卡

[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