foundation drill operator 基础钻机操作员

Rock Drill Operator 凿岩机操作员

Raise Drill Operator 天井钻机操作员

Press Drill Operator 钳工

foundation drill operator helper 基础钻机操作员帮手

core-drill operator 核心钻机操作员

ring drill operator 环钻运营商

jumbo drill operator 巨型钻机操作员

diamond-drill operator 金刚石钻机操作员

diamond-point drill operator 钻石点钻机操作员