cutting drum of coal drum shearer

Transferring drum and rubbing drum

Turning drum and twisting drum mechanism

(PEG)polyethyleneglycol

400 PEG 400

4A zeolite supported Pt and PEG complex

4-peg Hanoi Tower

a peg

a round peg in a square hole

a square peg in a round hole

adding peg-top azimuths surveyed

additive PEG

Additive-PEG

Adjustable Peg rate of exchange

alkyne-terminated PEG

anchor peg

anchored peg

auditory peg

batter peg