ISO 2556-1974 Plastics — Determination of the gas transmission rate of films and thin sheets under atmospheric pressure — Manometric method
ISO 2556-1974 塑料薄膜和薄板在大气压力 — — 测压法下的气体传输速率的测定
样品要求：A4大小, 3 pcs
周期：9~11个工作日
ISO 2556-1974 Plastics — Determination of the gas transmission rate of films and thin sheets under atmospheric pressure — Manometric method
ISO 2556-1974 塑料薄膜和薄板在大气压力 — — 测压法下的气体传输速率的测定
样品要求：A4大小, 3 pcs
周期：9~11个工作日