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视准线 shìzhǔnxiàn
bridg.constr. line of collimation
hydroel.st. observing line; observation line; sight
tech. collimating line; collimating ray; line of sight; pointing line
视准线
tech. line of collimation
视准线: 12 phrases in 6 subjects
Electronics2
General1
Information technology1
Space1
Technology6
Telecommunications1