请把定向工具装好！
Drill rig and its accessory tools were developed to meet the technical requirements of drilling Geo physical blast holes in soil and rock among mountainous and hilly area in China.
为满足我国山地丘陵地区物探爆破孔施工技术的要求，研究适合土层、岩层钻进用的钻机及工具，对钻机的配套设备进行了开发研究。
The electric power system harmonics simulator rig is one of the basic tools which are used to study harmonics.
而电力系统谐波模拟装置是谐波研究的最基本工具之一。
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