abating 硬度降低abc 自动锅炉控制aberration 象差abjustable spanner 活动]扳手abjusting spring 蝶弹簧ablation 烧蚀ablative cooling 烧蚀冷却ablative material 烧蚀材料above critical state 超临界状态abradability 磨耗性abrasion 磨损abrasion resistance 耐磨性abrasion test 磨损试验abrasion tester 磨耗试验机abrasion wear 磨料磨损abrasive 磨料abrasive band 砂带abrasive belt 砂带abrasive belt grinding 砂带磨光abrasive belt grinding machine 砂带磨床abrasive cloth 砂布abrasive cut off machine 砂轮切断机abrasive cut off wheel 切割砂轮abrasive ecp 磨料电解抛光abrasive grain 磨粒abrasive jet machining 磨料喷射加工abrasive machining 研磨加工abrasive paper 砂纸abrasive paste 研磨膏abrasive powder 研磨粉abrasive resistance 耐磨性abrasive tool 研磨工具abrasive wear 磨料磨损abrasive wheel 砂轮abrasive wire sawing machine 砂线切割机床abscissa 横坐标absolute 绝对的absolute acceleration 绝对加速度absolute assembler 绝对汇编程序absolute black body 绝对黑体ab