| 摘要 |
There is a measuring bar for determining internal dimensions within a confined space such as a window or door frame, etc. The measuring bar comprises a sleeve (1) and at least one graduated rod (6) longitudinally slidable within said sleeve section between a withdrawn position in which the rod is substantially within said sleeve (1) and an extended position in which a substantial portion of said rod protrudes from one end of said sleeve. In use the bar is located within said confined space, the rod (6) extended between chosen points within said space and the distance therebetween read off graduated scale (9). For larger dimensions which cannot be bridged by extending rod (6) alone, a second rod (5) is first extended out from the opposite end of the sleeve (1) to its full length before rod (6) is used to bridge the remaining distance and obtain the reading off graduated scale (9).
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