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正弦形 zhèngxiánxíng
el.mach. sinus; sinusoid
正弦形: 27 phrases in 15 subjects
Automobiles1
Aviation1
Bridge construction1
Communications1
Drilling2
Electric machinery2
General2
Hydroelectric power stations1
Metallurgy1
Nautical1
Polymers1
Rail transport1
Space1
Technology10
Wind Energy1