丝瓜视频官网,自拍偷拍专区,蜜桃视频在线观看www社区,亚洲男男GaYGaY无套




High purity hydrogen

High purity hydrogen

Item name Index
Pure hydrogen High purity hydrogen Ultrapure hydrogen
Hydrogen (H2) purity (volume fraction)/10-2  ≥ 99.99 99.999 99.9999
Oxygen (O2) content (volume fraction)/10-4  ≤ 5 1 0.2
Argon (Ar) content (volume fraction)/10-4  ≤ Supply and demand agreed Supply and demand agreed
Nitrogen (N2) content (volume fraction)/10-4  ≤ 60 5 0.4
Carbon monoxide (CO) content (volume fraction)/10-4  ≤ 5 1 0.1
Carbon dioxide (CO2) content (volume fraction)/10-4  ≤ 5 1 0.1
Methane (CH4) content (volume fraction)/10-4  ≤ 10 1 0.2
Water (H2O) content (volume fraction)/10-4  ≤ 10 3 0.5
Total magazine content (volume fraction)/10-4  ≤ - 10 1

       Supply method:
       1.  Pipe car supply
       2.  Cylinder supply 
       3.  Large-scale pipeline supply