... ,aluminim body 4.insulation class B ZHEJIANG JUSEN MECHANICAL AND ELECTRICAL CO.,LTD is profession manufactory for kinds of pumps, control ... and air transportation is extremely convenient.Company manufactured "Jusen" brand series pumps, which is based on unique - designed, new style, scientific ... -employed import-export certification" , and approved by ISO9001, and ISO2000. y2 series electrical motor