boss casting
... 毂径比 boss ratio 毂铸件 boss casting 箍 hoop ...
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轮毂、制动毂等高牌号合金铸铁，球铁铸件毛坯及其他汽车配件毛坯。
High-performance alloy casting iron such as hub break hub. Rough nodular casting and other casting of automobile replacement parts.
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