| 摘要 |
Abstract A washer for a rock bolt, the washer comprising a body having a leading end and a trailing end and an internal aperture extending between the leading end and the trailing end for receiving the rock bolt; and a coupling disposed on the body and arranged to receive an attachment having a complementary coupling so as to couple the attachment to the washer. U-00 (N 00 Q0 (NN 0m rQ 0N( b.0 |
