释义 |
Nominal size nominal size[′näm·ə·nəl ′sīz] (design engineering) Size used for purposes of general identification; the actual size of a part will be approximately the same as the nominal size but need not be exactly the same; for example, a rod may be referred to as ¼ inch, although the actual dimension on the drawing is 0.2495 inch, and in this case ¼ inch is the nominal size. Nominal sizeThe measurement used in naming a component, not necessarily its actual size when finished or milled. The size of timber is usually given in nominal size, and the actual size is slightly smaller, for example, a 2x4 actually measures 1 5/8 x 3 5/8 inches.nominal sizeThe dimensions of sawn lumber before it is dried or surfaced. Also see dressed size. |