wire-lineCOCA¹⁹⁸⁹¹⁹BNC²³⁶²¹³⁺¹ 基本例句 un.钢丝绳；🌏钢索式；有线 Aimed at low recovery of coal core in the area, wire-line coring diamond bits used here are improved. Firstly the shape of bits is improved to triple circular spiky toothed and bottom labium shaped; 针对该区煤心采取率低的情况，对绳索取心金刚石钻头进了了改进：一改钻头形状为三环尖齿底唇形状； chemyq