农业装备与车辆工程精选文章 关键词：液压；凿岩机；活塞；套阀 [gap=646]Keywords： hydraulic pressure； rock drilling machine； piston； one set of valves
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After 15 years of construction work, the 9.5-meter (31-foot) wide drilling machine will bore through the remaining 1.5 meters of rock to join two ends of the tunnel some 2,000 meters under a mountain.
经过15年的施工，9.5米宽的钻孔机将会钻穿最后剩下的1.5米的岩层，联通了位于山体下2000米的隧道两端。
This new model of drilling machine can bore through solid rock ten metres deep.
这台新型钻机能钻透十米厚的坚固岩石。
TPY-30 drilling machine is a type of shallow-hole drilling machine for exploration, it is suitable for drilling in soil, sand soil and medium harden rock drilling.
主tpy - 30型钻机是一种液压浅孔物探普查钻孔机，该机主要适用于土层，沙土层和中硬岩层中的钻进。
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