A.機械錨固和摩擦錨固 B.端部錨固和全長錨固 C.機械錨固和粘結錨固 D.粘結錨固和摩擦錨固
A.3h B.4h C.2h D.1h
A.補打錨桿 B.掛網(wǎng)補噴 C.補打錨桿并掛網(wǎng)再補噴 D.補噴