MARC全文
0100020227;20030609094958.0;7-5020-2035-7;平装;CNY48.00;20030609d2002 km y0chiy0120 ea;chi;CN;110000;ak z 000yy;r;注水压裂弱化控制煤层坚硬难冒顶板技术;zhu shui ya lie ruo hua kong zhi mei ceng jian ying nan mao ding ban ji shu;宋永津编著;北京;煤炭工业出版社;2002;iv, 314页;插图,表;21cm;煤层顶板;支护 ; 技术;a713 ; a721;宋永津;编著;CN;NGL;20030609;NGL;CB00066744,CB00066745;r¥48;713;256;alsy;b2;elsy0304