heading chain pillar 巷道矿柱
non-chain-pillar entry protection 无煤柱护巷
non chain pillar 无煤柱
entry chain pillar 平巷矿柱
width of chain pillar 护巷煤柱宽度
Pillar jib cranes to use more electric chain hoist hoisting mechanism and operating as a body, less use of wire rope electric hoist and chain hoist.
柱式悬臂起重机多采用环链电动葫芦作为起升机构和运行机构，较少采用钢丝绳电动葫芦和手拉葫芦。
This project to extend the industrial chain, to make the pillar industry has a huge advantage, development prospect.
该项目对于延长产业链、打造支柱产业有巨大优势，发展前景十分广阔。
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