Kerting anatangaza kwa dhati kwamba tunatoa skrini zingine pekee lakini sio za asili.Derrock, FLC, Hyperpool, PWP, Wimbi Screen ni alama za Derrock Corporation.NOV Brandt, VSM, Cobra, King Cobra, D380, D285P na LCM ni alama za Varco I/P, Inc. MI SWACO, ALS-2, MD-2, MD-3, MEERKAT PT, ...
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