4032 4037 4042 4047合金结构钢
价格：18.00
合金结构钢:(SAE标准)2317233023352340234525152512251731153120313031353140X3140314531503215322032303240324532503310331233163325333533403415343534504012401740234024402740284032403740424047406340684119412041214130413141354137414041454150416143BV1243BV14431743204340E43404419)