| 摘要 |
1,184,001. Welded metal ends. WHITTING- HAM & MITCHEL Ltd. 21 Feb., 1969 [1 April, 1968], No. 15466/68. Headings B7A and B7S. Plane metal plates, 1-4, extending the whole length of the boat, are assembled on to a jig having a base 5 and pivoted sides 9, 10, held in position (e.g. by welding to the jig) and welded up before being removed from the jig. If desired gunwhales, decking and other parts may be assembled on to the hull whilst still on the jig. In particular a propeller tube is added and located accurately by the jigs A metal duct 8 is also provided. |
