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механизм переключения скоростей stresses
automat.	control mechanism; speed change mechanism; speed-shifting mechanism; switchgear; gear-change mechanism
Makarov.	gear shifting mechanism; speed control mechanism
tech.	gear shift mechanism
механизм переключения скорости
mil., tech.	gear shift

механизм переключения скоростей: 2 phrases in 2 subjects

Mining	1
Oil / petroleum	1