6.5.5. Measures for construction of drilling mounting.Drill-mounted cable trough and fixed to the concrete-walled area:1. Mark the drill hole positions in the area to drilling. Use a hand-held drills or drill to drill in concrete. Use the drill 8 mm. 5 cm-deep drilling proceed. Note: do not push the drill bit too strong and constant drilling. Need a break halfway and used the momentum to protect the drill and drill, drill, drill drill blue repeatedly avoided too hot and fast-track drilling head.
đang được dịch, vui lòng đợi..
