Relationship between horizontal Christmas tree and vertical Christmas tree

Specifically, there are the following links:

1. Both horizontal and vertical Christmas trees are installed above underwater oil wells to control the flow, pressure and direction of wellhead oil production or water injection.

2. Both horizontal and vertical Christmas trees are connected to the top of the well and provide an interface to control the operation of the well, such as opening/closing valves and monitoring wellhead pressure.

Why did Feng Gong part ways with the cow?

Paper on beverage modeling

Urgent need for graduation thesis format! ! !

Undergraduate graduation thesis questionnaire needs pre-investigation.

What if my medical paper can't be published?

Technical paper on interactive tablet computer

On the basic format of works and articles

What does the company's network administrator do?

What's the grammatical difference between local dialect and Mandarin?

Translation format of English-Chinese scientific papers