用crack zone造句子,“crack zone”造句
來源:國語幫 2.31W
There was an inverse"C"shape crack zone ahead of mining face where methane was active.
There exits bed separation zone above water-conducting crack zone overburden after coal mining.
There was an inverse"C"shape crack zone ahead of mining face where methane was active.
There exits bed separation zone above water-conducting crack zone overburden after coal mining.