Altera-mechanica Sigilla GW92-53
Sigillum Diaboli GW92-53 in Alfa Laval Pumps 
 materiae:
 Gyratorius annulum, Carbon / Sic 
stabilis annulum, SUS304 / SUS316 / c / C. 
secundarium signum, Viton, EPDM 
Spring et metallum partes: SUS3047 / SUC316
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