صدای دنده دار کردن

Ratchet mechanism - single turn. (6)

Electric typewriter, Olivetti-Lettera E501 - small plastic gear turning, short ticks. (4)

Electric typewriter, Panasonic R300 - paper wheel spin, ratchets. (4)

Ratchet mechanism - single turn. (8)

Ratchet mechanism - single turn. (2)

Electric typewriter, Olivetti-Lettera E501 - small plastic gear turning, short ticks. (1)

Electric typewriter, Panasonic R300 - paper wheel spin, ratchets. (3)

Gear dial or switch

Small plastic rotary control - turn, light clicks.

Rotary control, metal - crank, gear clicks.

Plastic rotary control - loose spin, gear clicks, medium length.

برق ماشین تحریر اریکا 3006 - کاغذ چرخ رسید.

سوسک فولکس واگن شروع دور به دنده سفر و توقف خودرو ،

سوسک فولکس واگن شروع دور به دنده سفر و توقف خودرو ،

Electric typewriter, Gabriele 100 - small gear ticking, close.