To provide a pipeline mechanism that has a refittable structure and ease of fitting, can maintain high airtightness, and has a small amount of flow obstacle, for use in fluid industry, such as liquid transport semiconductor manufacture, medical/drug manufacture, food processing, and chemical industry. 液体移送の半導体製造や医療・医薬品製造、食品加工、化学工業等の流体産業界では管路機構とは、再装着が可能の構造と装着の容易性を具備した管路機構で、かつ高気密性も維持可能なの流量障害が少ない管路機構が求められる。 - 特許庁