1875 E. H. Knight II. 1535/1 Nozzle-block, one in which two bellows-nozzles unite.
1929 A. 125 88 The back and sides [of the chambers were formed] by the machined gap in the nozzle block.
1991 23 Aug. 880/2 The nozzle block..contains a perpendicular channel for the ablation-laser beam.