Popular Listings
Fitness Weight Belt
We're professional fitness weight belt manufacturers in China for 15 years, specialized in providing high quality customized products. We warmly welcome you to wholesale cheap fitness weight belt made
... Read more
4 Core Shielded Alarm Cable
|
As one of the leading 4 core shielded alarm cable manufacturers and suppliers in China, we warmly welcome you to buy high quality 4 core shielded alarm cable made in China here from our factory. Good
... Read more
2 Core Copper Alarm Cable
As one of the leading 2 core copper alarm cable manufacturers and suppliers in China, we warmly welcome you to buy high quality 2 core copper alarm cable made in China here from our factory. Good
... Read more
Workout Nylon Yoga Pants For Women
|
As one of the leading workout nylon yoga pants for women suppliers in China, we warmly welcome you to wholesale bulk workout nylon yoga pants for women made in China here from our factory. All
... Read more
ZHUOCHI TECH CO.,LTD
Zhuochi Tech Co., Ltd is a company specializing in the development and sales of complete sets of high-frequency dielectric heating equipment. The equipment developed by our company is widely used in
... Read more
Top Categories
- Agriculture
- Vanilla Beans
- Workwear
- Vehicle Tools
- Skin Care Tool
- Translation Services
- Polymer
- Waterproofing Materials
- Video Games Accessories
- Wiring Accessories
- Passive Components
- Wood Pellets
- Water Treatment
- Measuring Analysing Instrument Stocks
- Scarf, Hat Glove Sets
- Vegetable Products
- Outdoor Furniture
- Stickers
- Used Hardware
- Pharmaceutical
- Tableware
- Wet Towel Dispensers
- Professional Lighting
- Wallets Holders
- Woodworking Machinery
- Weighing Scales
- Welding Soldering Supplies
- Zinc
- Yellow Page
- Strapping
- Rubber Stocks
- Workplace Safety Supplies
- Wedding Supplies
- Used Shoes
- Winter Sports
- Telephones Accessories
- Yarn
- Watches
- Used Tools
- Wind Up Toys
Glossary of Mining Terms - Coal Education
Category: Educational Toys
A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back ...
Alexa Traffic
