DIN 38412-13
German standard methods for the examination of water, waste water and sludge; test methods using water organisms (group L); determination of oxygen production and oxygen consumption in an aquatic environment (SPG and SVG) by means of the light and dark bottle method (L 13) (determination of biogenic aeration rate)
现行
发布日期 :
2001-09-01
实施日期 :
DIN 13-1
General purpose ISO metric screw threads - Nominal sizes for 1 mm to 68 mm diameter coarse pitch threads
现行
发布日期 :
2001-11-01
实施日期 :