Note that the breechblock in this firearm rotates about an axis perpendicular to the main axis of the barrel , whereas most other rotating breechblocks rotate about the same axis as the long axis of the barrel .
VERB SCONJ DET NOUN ADP DET NOUN VERB ADP DET ADJ NOUN ADP DET ADJ NOUN ADP DET NOUN , SCONJ ADJ ADJ VERB NOUN VERB ADP DET ADJ NOUN ADP DET ADJ NOUN ADP DET NOUN .