CONSTRUCTION: It is composed of an inner rubber protection layer, middle rubber layer, steel wirespiral layer and external rubber cover.
结构：由内胶层、内胶保护层、中胶层、钢丝缠绕层和外胶层组成。
2
Our main products are steel wire weaving and wirespiral rubber hose, oil drilling pipe, oil and liquefied petroleum gas and special gas hose, sandblast pipe.
我公司主要产品有钢丝编织和钢丝缠绕胶管、石油钻探管，石油液化气及天然气专用胶管、喷沙管等。
3
Spiral binding: a method of binding in which a continuous wire is threaded through holes punched in the binding edge of the pages. see mechanical binding.