求翻译：我公司产品已通过ISO9001-2000GB质量管理体系的认证。产品主要是铁模覆砂生产线，树脂砂造型，覆膜砂壳体等多种铸造工艺适应4吨以下的灰铸铁、球墨铸铁等多种牌号的铸铁件。是什么意思？

Our products have passed ISO9001-2000GB quality management system certification. The main products are iron mold Sand production line, resin sand molding, shell coated sand casting process to adapt to a variety of 4 tons of gray iron, ductile iron and many other brands of cast iron.

Our company products have passed ISO GB 9001 - 2000 quality management system certification. Our products are mainly sand production lines, the rail model by resin sand, coated shell sand casting procedures such as adaptation four tons of Gray cast iron, ductile iron brands of cast iron.

Our company product already through ISO9001-2000GB quality control system authentication.The product mainly is the iron mold duplicate granulated substance production line, the resin granulated substance modelling, the membrana tectoria granulated substance shell and so on many kinds of casting craf

The products of our company has passed ISO9001-2000GB quality management system certification. Products are mainly iron mould coated sand production line, resin bonded sand molding, precoated sand casting technique of shell and other adapted to the 4 tons of gray cast iron, nodular cast iron, and ot

The products of our company has passed ISO9001-2000GB quality management system certification. Products are mainly iron mould coated sand production line, resin bonded sand molding, precoated sand casting technique of shell and other adapted to the 4 tons of gray cast iron, nodular cast iron, and ot