Key technology of directional drilling along each layer of 3000m underground coal mine. pdf

Release time:

2020-11-26

Author:

Source:

Key Technology of Directional Drilling Along Each Layer at 3000m in Coal Mine

Key words:

Coal mine underground broken soft coal seam air composite directional drilling technology and equipment.pdf

Development and application of high efficiency drilling equipment for soft and hard composite coal seam

Coal mine underground broken soft coal seam air composite directional drilling technology and equipment.pdf

Development and application of high efficiency drilling equipment for soft and hard composite coal seam

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

COOKIES

required

These cookies are necessary for basic functions such as payment. Standard cookies cannot be turned off and do not store any of your information.

analyze

These cookies collect information, such as how many people are using our site or which pages are popular, to help us improve the customer experience. Turning these cookies off will mean we can't collect information to improve your experience.

Feature

These cookies enable the website to provide enhanced functionality and personalization. They may be set by us or by third-party providers whose services we have added to our pages. If you do not allow these cookies, some or all of these services may not function properly.

advertise

These cookies help us understand what you are interested in so that we can show you relevant advertising on other websites. Turning these cookies off will mean we are unable to show you any personalized advertising.

Hotline:

+86-400-635-9960

Yikuang Douyin

Business License