Chemical products for industrial use; Sampling techniques; Solid chemical products in the form of particles varying from powders to coarse lumps— 36 стр.
Chemicals used for treatment of water intended for human consumption - Aluminium-based coagulants - Analytical methods; German version EN 1302:1999— 25 стр.
Treatment of water of swimming-pools and baths - Part 3: Combination of process: Flocculation, filtration, ozonization, absorbing filtration, chlorination— 7 стр.
