















An implement held vertically and viewed through an optical surveying instrument such as a transit, used to measure distance in land surveying and construction layout; an engineer's rod, surveyor's rod, surveying rod, leveling rod, ranging rod. The modern engineer's or surveyor's rod commonly is eight or ten feet long and often designed to extend higher. In former times a surveyor's rod often was a single wooden pole or composed of multiple sectioned and socketed pieces, and besides serving as a sighting target was used to measure distance on the ground horizontally, hence for convenience was of one rod or pole in length, that is, 5 1/2 yards.









Anh ấy xem lại đoạn phim từ camera an ninh và ngạc nhiên khi thấy vài que lạ mờ ảo, kéo dài, vụt ngang màn hình, mặc dù lúc quay anh ấy không hề thấy có gì khác thường.





