| 摘要 |
1. Poling for timbering galleries during underground mining and tunnelling works, whose longitudinal rods, with perpendicular transverse rods, are bent at their ends to create a double hook, and the end of the rod, which creates the double hook, turns back through that hook and goes parallel to the connected longitudinal rod, characterised in that the longitudinal rods (2) are bent to create a double hook (3) on one end (4) of the mat only, and on the opposite end (5) of the mat they run straight, and their meshed ends (10) are connected with the parallel longitudinal rods through the guide rods (7,8) placed between them.<IMAGE>
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