At present, the methods of ore and rock loosening and crushing are mechanical loosening and crushing, blasting, loose and broken method.
举一反三
- Which of the following is the ore breaking methods?( ) A: Artificial ore breaking B: Mechanical and hydraulic ore breaking C: Rock drilling and blasting D: The other three options all meet the requirements
- Common chemical mutagen treatment methods include dipping method ( ), application method, or drip method.
- Which of the following is not chamber blasting? ( ) A: Shallow hole blasting B: Collapse blasting C: Discard blasting D: Loose blasting
- The two basic methods for the translation of foreign subsidiary financial statements are the ________ method and the ________ method.
- 60. John watched the water lap at the steps, but felt a crushing guilt. A: watched B: but C: crushing D: guilt