Subjects: PETROCHEMISTS; JOB descriptions; JOB qualificationsUNITED States
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Subjects: MACHINE separators; SOLID-liquid interfaces; CENTRIFUGAL force
Subjects: PETROCHEMISTS; PETROLEUM engineering; PETROLEUM chemistryPETROLEUM: A Treatise (Book)REDWOOD, Thomas Boverton
Subjects: GOLD ore geology; MAGMATISM; URANIUM-lead dating
Subjects: ULTRASONIC waves; SAND; BURIED pipes (Engineering)
Subjects: PETROCHEMISTS; PLATE tectonics; EOCENE EpochIRAN
Subjects: *PETROCHEMISTS; *METASOMATISM; *NEOARCHAEAN
Subjects: *TIBOUCHINA; *PETROCHEMISTS; *EMISSIONS (Air pollution)