It is required that the structure of the equipment of work face in thin seam is simple, reliable and easy to maintain and install.
举一反三
- It is required that the structure of the equipment of work face in thin seam is simple, reliable and easy to maintain and install. A: 正确 B: 错误
- Features of geneva mechanism include A: Simple structure B: Easy to manufacture C: Reliable D: High efficiency
- The body of shearer in thin seam should be as ( ) as possible. A: Long B: Short C: High D: No requirements
- Finger-prints have often been used as a method of solving criminal case because it ______. A: is complicated but reliable B: is simple and not expensive C: is expensive but easy to do D: can bring a lot of money
- Most large power systems install equipment to allow operations personnel to ( ) and operate the system in a reliable manner. We will lump these under the commonly used title system security. A: monitor B: repair C: establish D: study