fixed head magnetic drum
floating head magnetic drum
Shaft head of brake drum for pilot wheel
cutting drum of coal drum shearer
Transferring drum and rubbing drum
Turning drum and twisting drum mechanism
hammer head [= hammer head shark]
head to head configuration
A Brief Analysis of Zhao Ji’s Snare Drum Works
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
automatic sponge drum sander