Abstract: An integrative management system of tube/hose parts is provided, which can correctly change bulk parts upon changes of tube/hose pats. This integrative management system includes a database for managing in a centralized manner tube/hose parts together with corresponding rolled long bulk parts each being a sales unit of corresponding one of the tube/hose parts by relating bulk part codes of the bulk parts to part codes of corresponding tube/hose parts, respectively; and data manipulation means for search, renewal, erasure and entry of data stored in the database.

Abstract: An intake manifold structure for a multi-cylinder engine having first and second independent mixture generators such as carburetors and first and second intake manifolds communicating the mixture generators to respective plural cylinders. A control gas passage and a treating gas passage are provided for introducing a control gas such as return flow exhaust gas, an additional pulse of air or the like, and a treating gas such as crankcase blow-by gas to the manifolds. The control gas passage is arranged to open into the interiors of respective diverging portions of the intake manifolds. The treating gas passage is arranged to open to the interiors of any other portions, avoiding the diverging portions, of the intake manifolds.