单词	标准频率信号
释义	标准频率信号〖电〗standard frequency signal
随便看	copolymer of propylene Copolymer of propylene-ethylene copolymer of styrene copolymer of vinylchloride copolymer of vinyl chloride-vinyl acetate copolymer precursors Copolymer,Pyran copolymer resin copolymer resins copolymer rubber copolymers co-polymers copolymer scale inhibitor Copolymers-composition copolymers derivatives as well Copolymer Size Mixture copolymers of aliphatic copolymers copolymers of aliphatic copolymers with three copolymers of derivatives copolymers of derivatives of unsaturated acids copolymers of monoolefinic copolymers of monoolefinic unsaturated copolymers of unsaturated carboxyclic rings copolymer structure Copolymers with a-methylstyrene