2016 Jining Guolong DJD metal roof beam is on sale

DD metal roof beam DD long metal beam
D long beam D metal roof beam D cross-shaped roof beam D double wedge roof beam D hinged roof beam D-type metal roof beam
D metal roof beam model D, D
. The long metal beam is a non-articulated roof beam. It can be used with various types of monomer and friction pillars with hinged roofs to form metal brackets for coal mines to use on horizontal and gently inclined mining working faces and machine heads or Used for other larger control top areas.
, The long-span cantilevered metal beam supports the roof of the controlled roof area to achieve a larger working space without pillar support. Created to improve working conditions and adopt new coal mining machinery and bendable transporters
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