| 摘要 |
An explosive composition comprising 20% very fine pentaerythritol tetranitrate (PETN) 70% red lead and as a binder 10% of a 50/50 mixture of butyl rubber and a thermoplastic terpene resin (mixture of polymers of b -pinene of formula (C10H6)n) is extruded into a cord for positioning inside a pair of concentric tubes to be explosively bonded. U.S.A. Specification 3,093,521 is referred to. |
