N109主缸毛坯缩孔／缩松废品产生原因及控制对策

对N109主缸毛坯缩孔／缩松废品产生的原因，即铝液精炼、浇注温度、凝固顺序等方面要素进行了分析，采用了新的精炼剂及除渣剂，提高铝液精炼除气、除渣效果，控制浇注温度及改善毛坯铸件凝固顺序等措施。解决了N109主缸毛坯缩孔／缩松问题，取得了良好的效果

A New Type of Rotary-mounted Oil Filter Assembly Tools

Aim at currently a diesel engine engine oil to filter a pure machine body in the middle of the assemble exis- tent problem, develop a kind of new engine oil filter a pure machine body to assemble tool, and is assembling a ear to throw in an use, compared with the traditional assemble tool, this kind of the new assemble tool raised the engine oil filters a pure machine body of assemble quality, to keep motor engine oil from filtering pure machine body and engine oil filtering a pure machine join together noodles of leak oil breakdown, have an important function.