履带牵引机[词典] caterpillar-tractor;[例句]DY型履带式塑料型材牵引机采用双履带式牵引方式，可控硅无级调速。DY Model caterpillar type shaped plastic material drawer adopts double caterpillar drawing method, thyristor stepless governor.
履带牵引机Caterpillar tractor
