Английский язык. Теория механизмов и машин. Профессиональная составляющая языковой подготовки. Горбенко М.В - 37 стр.

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Figure III.1
Spur gears are used to transmit
rotary motion between parallel
shafts.
Figure III.3
Bevel gears are used to transmit
rotary motion between intersecting
shafts.
Figure III.2
Helical gears are used to
transmit motion between
parallel or nonparallel
shafts.