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tech.	尖轨转辙器; 尖轨转换器

point switch : 53 phrases in 15 subjects

Automobiles	1
Aviation	2
Communications	2
Computer networks	1
Construction	1
Electric machinery	1
Electronics	3
General	1
Geophysics	1
Information technology	1
Mathematics	1
Rail transport	8
Shipbuilding	1
Technology	28
Telecommunications	1