黑刚玉砂(又名低铝刚玉砂，铁砂粉)是一种新型抛光材料。
Black Aluminium Oxide AbrasiveBlack Aluminium Oxide abrasive (lower Aluminium Oxide abrasive) is a new type abrasive material for polishing various metal works.
黑刚玉砂（又名低铝刚玉砂，铁砂粉）是一种新型抛光材料。
Black Aluminium Oxide Abrasive
Black Aluminium Oxide Abrasive(lower Aluminium Oxide Abrasive)is a new type abrasive material for polishing various metal works.
我公司生产的油石有棕刚玉（A）、白刚玉（WA）、黑碳化硅（C）、绿碳化硅（GC）等材质。
The oilstones produced by our company include brown corundum(A), white corundum(WA), black carborundum(C), green carborundum(GC)etc.
我公司生产的油石有棕刚玉（A）、白刚玉（WA）、黑碳化硅（C）、绿碳化硅（GC）等材质。
The oilstones produced by our company include brown corundum(A), white corundum(WA), black carborundum(C), green carborundum(GC)etc.
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