| 摘要 |
<p>The invention herein described relates to a crib support system comprising a plurality of crib members each member consisting of a main body part including a plurality of members which would join theretogether and interlocking part comprising a plurality of block members which are joined to said main body part so that spaces are provided between same whereby said spaces can be used to interlock adjacent members when positioned next to each other. The invention is for use in supporting mine tunnels and/or other subterranean excavations.</p> |
