久久久久亚洲av无码专区首,好男人社区在线影视WWW,无套无码孕妇啪啪

Your Current Position: NEWS CENTER

06

2024-12

【Technical article】 O-type ball valve and V-type ball valve difference

Ball valve has many kinds of structure, but basically the same little difference, are the opening and closing parts for the round ball core, mainly by the valve seat, ball, sealing ring
29

2024-11

【Industry trends】 To build a new model of low-carbon and efficient surface system in Dagang Oilfield

On August 22, the oil and gas produced by the oil Wells under the supervision of Wangxuzhuang Oilfield in Dagang was directly transported to the joint station
22

2024-11

【Technical article】 Effective troubleshooting method after trap failure
15

2024-11

【Industry trends】 Changqing Oilfield: Light up "Science and technology Tree" for winter supply "gas storage"

As of October 31, 1,750 Wells had been drilled and 997 Wells had been put into operation in the production capacity construction of the self-operating area of Changqing Gas field
08

2024-11

【Technical article】 Harm and protection of abnormal pressure boost in gate valve

Gate valves usually have single gate, double gate, wedge, parallel and other structural designs
01

2024-11

【Technical article】 Valve sealing surface grinding is a key step to ensure sealing performance

The sealing performance of the valve directly affects the control effect of the fluid medium and the safe operation of the system
25

2024-10

【Technical article】 Valve sealing surface material selection factors to consider

Sealing surface is the most critical working face of the valve, the quality of the sealing surface directly affects the service life of the valve
18

2024-10

【Industry trends】 Ultra-short radius horizontal well technology in Huabei oilfield to exploit the remaining oil at the far end

On September 19, the oil production plant No. 3 of Huabei Oilfield, which had been shut down for more than 4 years due to high water cut
10

2024-10

【Industry trends】 What are the precautions for manual operation of electric valves

The electric actuator of valve ? is used to control the valve. If the valve cannot be opened and closed due to some factors, such as power failure, failure of the
27

2024-09

【Technical article】 Working principle of pressure valve

Pressure valve is a device used in hydraulic system to control and regulate liquid flow pressure.

First <Previous 1 2 3 4 5 6 7 8 9 ... Next> End

欧美乱码伦视频免费_色琪琪www618seon_日本免费a∨片免费_久久久夜色精品亚洲a_午夜性大片_亚洲综合精品伊人久久