| 摘要 |
The internal volume of a plastics manifold 2, formed in two parts connected by friction welding at a parting plane (T, Fig. 2), is variable to suit engines of different capacity by inserting one or more bodies 7 into the manifold. The bodies 7 may have flanges (9, Fig. 3) friction welded to the manifold and be of different shape (Figs. 4 to 7).
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