Chabad.org — English translation + Rashi
Torah Temimah points to Menachos 63a.
E-Daf.com — Menachos 63a
HebrewBooks / Shas PDF
English: It was taught, Rabbi Chanina ben Gamliel says: The marcheshes is deep and its products are soft.
Definition of marcheshes — a deep vessel that yields a soft product.
A deep-pan minchah yields a soft product, in contrast to the flat machavas. Rabbi Chanina ben Gamliel defines the marcheshes as a deep vessel whose products come out soft, completing the contrast with the flat, hard-product machavas.