longwall system造句

例句与造句

1. The alternative method of working the coal was the longwall system.
2. To extract coal the owner adopted the Longwall system of mining.
3. All the districts in Dennis were worked by the longwall system where the coal face was mined in single blocks.
4. The church was built using the longwall system ( not the carcass system, as it was typical for this period ).
5. These districts were worked by the longwall system but the 20's and 61's, which were furthest from the shaft, were worked by hand when the remaining districts were mechanised.
6. It's difficult to find longwall system in a sentence. 用longwall system造句挺难的