多种能岩芯钻机的优越性体现在哪里
<=":宋体;:12><=":12>
<="">
<=":12>&>>
<="">
<=":宋体;:12><=":12><=":宋体;:12><=":12>
<="">
<=":12>&>>
<="">
<=":宋体;:12><=":12><=":宋体;:12><=":12><=":宋体;:12><=":12--;">,支承距大,钻机刚性好。-;">>
<="">
<=":12>&>>
<="">
<=":宋体;:12><=":12><=":宋体;:12><=":12>
<="">
<=":12>
<="">
<=":12>