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# External tube for boring device
# Inner tube for sampler
# Sampler inner tube
# A sampling tube with a rubber shirt
# Sampling tube with rubber sleeve
# Withdrawal sampling tube
# Packaging tube perforating device
# Double tube braking device
# liquid sampling device
# Violent sampling device
# Bottom sampling device
# sampling tube
# Who invented the sprinkler tube?
# Who invented the x-ray tube?
# Who invented the electron tube?
# Who invented the gas discharge tube?
# Who invented the cathode ray tube?
# sample extraction tube
# exit tube
# External pressurized drill pipe
