Explanatory notes
… covers, in particular, “camel‑back” strips with a slightly trapezoidal cross‑section, for retreading rubber tyres. (B) … rubber, for example : (1) Rubber thread made by helicoidal cutting of unvulcanised rubber sheets or by … certain kinds of airtight containers, or sealing the joints between two (usually rigid) parts. (3) Plates, sheets …