- ore hardness
- orehardne
- 矿: ore deposit
- 硬: hard; stiff; tough
- 矿用: mining; mine◇矿用安全灯 geordie; 矿用变电所 substating; 矿用材(坑木) mine timber; 矿用柴油机车 diesel mine locomotive; 矿用电动机 mining motor; 矿用电机车 mining electric locomotive; 矿用机车 mine locomotive; mining locomotive; 矿用罗盘 mine dial; 矿用通风机 mine fan; 矿用拖拉机 mine tractor; 矿用炸药 mining explosive
- 矿英寸: miners inch
- 矿用安全灯: geordie
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