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平行光束 píngxíng guāngshù
agric. collimated light beam
tech. parallel beam; parallel light beam; pencil of parallel rays
telecom. straight beam
前照灯平行光束
auto. straight beam
平行光射线
auto. parallel beam
平行光束
: 8 phrases in 3 subjects
Metallurgy1
Shipbuilding1
Technology6