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It is not an entity rule, it has no distance limit; It can measure the irregular objects; It is through the GPS measuring distance. It is the….., There are three big advantages compared with traditional measuring tape:
the first, it is no longer use article entity's feet, don't have to use visual and appraise to read, but the digital display
the second, it can directly measure the distance between two points, no longer restricted by the object shape
the third, It can measure the infinite length distance, no longer limited by article feet
Henan province Zhengzhou city