Kertong kanthi nyata nyatakake yen kita mung ngasilake layar pengganti nanging ora asli.Derrock, FLC, Hyperpool, PWP, Wave Screen minangka tandha saka Derrock Corporation.NOV Brandt, VSM, Cobra, King Cobra, D380, D285P lan LCM minangka tandha saka Varco I/P, Inc. MI SWACO, ALS-2, MD-2, MD-3, MEERKAT PT, ...
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