cutting drum of coal drum shearer

Transferring drum and rubbing drum

Turning drum and twisting drum mechanism

pulse width modulate digital pulse width modulation tech-nique

3-drum building machine

6-face Rotating Drum

A Brief Analysis of Zhao Ji’s Snare Drum Works

a drum-shaped rattle

a new eight-corner drum mixing device

a small drum for marking time

A Study in Da Yue of Xi’an Gu Yue Drum Music

absorber drum

Accumulator Drum

AG drum

agitation drum

air drum

air-drum

anchor handling drum

armature drum