... any extra operations 2.Locking cylinders in one second, PGas-24 Portable 2 in 1 Gas DetectorIntroductionThis steel cylinder barrow adopts ... Compact, flexible, convenient, and mobile;2. Easy in operation and applicable in various occasions;3. Intelligent, fully automatic, without any ... extra operations;4. Locking cylinders in one second, rapid and efficient;5. Protecting from drop from the air ...