with parallel plough units used alternately

Full Title

Ploughs with fixed plough-shares > Tractor-drawn ploughs > Alternating ploughs > with parallel plough units used alternately

Classification Context

Section:

HUMAN NECESSITIES

Class:

AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING

Subclass:

SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL