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一、球墨铸铁管的生产是日本铸造业的重要支柱球墨铸铁管产量在几个工业发达国家中所占球铁总产量的比例都十分高,美国约28％,日本约58％,英国和西德约65％,法国由于有大型铸管公司木松桥的存在,球铁管产量占其球铁总产量的90％。日本1983年球铁管总产量为90万吨,其中直管839692吨;异型管60867吨。日本共有生产球铁管的厂家21间,规模比较大的只有久保田和栗本,但其从业人员也只有千人上下,其它都是中小工厂,一般只有50人左右,多的也不超过500人,全国球铁管业的从业人员约5000人,但每人每年平均可创造产值2800万日元(相当人民币28万元),获利每
First, the ductile iron pipe production is an important pillar of Japan’s foundry industry Ductile iron pipe production in several industrialized countries account for the proportion of the total iron production is very high, the United States about 28%, Japan about 58%, Britain and West About 65% de France, France ductile iron pipe production accounts for 90% of its total ductile iron production due to the existence of a large cast pipe company, MuSongQiao. In 1983, the total output of ductile iron pipe in Japan was 900,000 tons, of which 839,642 tons were straight pipes and 60,867 tons of special-shaped pipes. Japan has a total of 21 ductile iron pipe manufacturers, KUBOTA and Kuribayashi only relatively large scale, but its practitioners also only have thousands of people up and down, the other are small and medium-sized factories, generally only about 50 people, many of which are not more than 500 people, The national ductile iron pipe industry employs about 5,000 people, but each person can create an average annual output value 28 million yen (equivalent to 280,000 yuan), profit per