which required strong enough to support the scaffoldings in safe. we can produce and have
produced several kinds of screw jacks for customer's choice.
Our advantage of screw jack: 1, we produce the nuts by ourself; 2, our welding are totally done
by machine.
met.creatrue.net/Ringlock-Scaffolding_501.html#.U2maxqLrZk8
This seems to be strong enough to support the scaffoldings in safe.
ReplyDeleteadjustable screw jack