CS Cast Steel 铸钢

CSD Constant Speed Drive 恒速驱动器

CT Cycle Time 节拍

CTN Carton 纸箱

CTS Coolant Temperature Sensor 水温传感器

CV Check Valve 止回阀

CW Copper Weld 铜焊

CYL Cylinder 汽缸

CYP Cylinder Position 汽缸位置

DC Drill Collar 钻铤

DCS Decentralization Control System 分散控制系统

DD Direct Drive 直接驱动

DF Disc Filter 圆盘过滤器

DG Disc Grinder 园盘磨床[研磨机]

DIR Department of Industrial Research 工业研究部

DL departure log 横向测井

DMR Defective Material Report 材料缺陷报告

DN Diameter Nominal 公称通径

DP Diametral Pitch (齿轮)径节

DR drilling 钻进