502 / | HD | CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING |
527.19 | DF | MONOLITH WITH SPECIFIED SHAPE OR DIMENSION OF CELL OPENING (E.G., HONEYCOMB, RINGS, ETC.) {3} |
527.2 | .~ Cell opening shape and dimensions are determined by the intersection of the woof and the warp of a woven structure (e.g., of a fabric or gauze, etc.) |