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Explanation: It seems! man refers to ships, vessels, their structures rather than to forms/moulds, which in fact do represent other industries. In defending my viewpoint I would also dare argue I never came across the terms "mould making", "diemaking" in the context of the shipbuilding sector....
Perhaps the website on ship structures will be of help...
Ship Structure and Hull Size Limitations
... Freelance Traveller. The Shipyard. Ship Structure
and Hull Size Limitations. by Christopher Thrash. ... www.freelancetraveller.com/features/ shipyard/hulls1.html - 32k