GS0061: AN ARRAY OF METAL CYLINDERS FOR COMPRESSED GAS SOLD EMPTY CONTAINED IN A SHIPPING FRAME, EACH CYLINDER HAVING A COMPRESSED GAS PORT AND THE PORTS BEING INTERCONNECTED BY ONE OR MORE GAS HEADERS
GS0121: CARGO TRAILERS FOR THE TRANSPORT OF COMPRESSED GAS,CONSISTING IN PART OF METAL AND NON-METAL CYLINDERS FOR COMPRESSED GAS
GS0201: AN ARRAY OF NON-METAL CYLINDERS FOR COMPRESSED GAS SOLD EMPTY CONTAINED IN A SHIPPING FRAME, EACH CYLINDER HAVING A COMPRESSED GAS PORT AND THE PORTS BEING INTERCONNECTED BY ONE OR MORE GAS HEADERS