74272774
May 6, 1992
Dec 7, 1993
apparatus, instruments and devices for controlling, regulating and checking the process of the treatment of effluents, in particular, for controlling and regulating the lev 1, the temperature, the pH, the volume, the pressure of the effluents, and for controlling and testing gas
Electrical and Scientific Apparatusindustrial installation for treating, purifying industrial liquid effluents
Environmental Control Apparatus