id	keyword
brj-22298	extraction
brj-22298	oil
brj-22298	walnut
brj-22298	oil extraction
brj-22298	acid
brj-22298	ultrasonic
brj-22298	efficiency
brj-22298	time
brj-22298	kernel
brj-22298	extraction efficiency
brj-22298	wang
brj-22298	liquid
brj-22298	soxhlet