Many products are manufactured from very thin materials which would be virtually impossible to cross hatch in a sectional view and in these cases it is usual to make them entirely black. Where however two or more thin sections are adjacent to each other, a gap is left so that the profile of the separate components is clearly defined. A compound stanchion used in structural steelwork and drawn to reduced scale is shown in Fig. 8.12. The same situation applies with sections through sheet-metal fabrications, gaskets, seals and packings.
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