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trokellus

trokellus [ME trokel < CL trochlea], round or cylindrical component of mechanical device, wheel, roller. 1274 in ij paribus rotarum ad carett', j pari rotarum ad fimos extraendos ‥ omni custu carett' computat' ‥ cum trokelis reparandis MinAc 984/4 r. 4; 1289 in ferramentis caruce per vices, vj d.; in uno trokello empto, vj d. Ib. 1237/28.

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