一、过滤器的过滤等级划分。 中国标准等级 欧洲标准等级 粗效过滤器 G1、G2、G3 中效过滤器 G4、F5 高中效过滤器 F6、F7、F8、F9 亚高效过滤器 H10、H11 高效过滤器 H12、H13、H14 二、过滤器过滤效率。 过滤等级 过滤精度 过滤效率 G1(EN779) ≥5um 40% G2(EN779) ≥5um 70% G3(EN779) ≥5um 85% G4(EN779) ≥5um 90% F5(EN779) 1-10um 35% F6(EN779) 1-10um 45% F7(EN779) 1-10um 65% F8(EN779) 1-10um 85% F9(EN779) 1-10um 95% H10(EN18822) ≥ 90% H11(EN18822) ≥ 99% H12(EN18822) ≥ % H13(EN18822) ≥ % H14(EN18822) ≥
江苏财经职业 技术学院 专科毕业设计说明书 山东建筑大学毕业设计说明书 I 目 录 摘要····································································Ⅲ ABSTRACT ····························································Ⅳ 1 前 言 1.1 课题的特点及研究意义 ·················································1 1.2 模具发展行业的研究现状 ················································1 1.3 课题设计思路及研究内容 ···············································2 2 工艺分析及计