After ten years of accumulated precipitation, Woshiyuan has a long-term planning, adhering to strive for development of industrial aluminum profiles accessories, pipeline fittings and other items.
历经十多年的积累沉淀，沃士源长远规划，秉承锐意研发工业铝型材配件、流水线配件等项目。
Proper functioning is only assured if suction pipeline, fittings and pump are tight.
只有在泵与吸入管及附件紧密时才能确保其功能。
Basic knowledge of polyethylene material, pipe fittings specifications, pipeline construction specifications, technical points, management experience and design parameters.
聚乙烯材料基础知识、管材管件规格、管道的施工规范、技术要点、管理经验及设计参数。
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