Our company is the profession factory to produce straight shank twist drill and wood working drill, and is national united export product base of"trade, industry, agriculture" .
我公司是从事直柄麻花钻和木工钻生产经营的专业厂商，是国家“贸工农”联合出口商品生产基地企业。
2
Contact problems between concrete base surface and column base, bolt nut and neighborhood plate, bolt shank and bolt hole are simulated really.