A reticle-masking objective for imaging an object plane onto an image plane has a condenser portion, an intermediate portion, and a field lens portion. Each anvil block has a planar face 16 oriented to receive material thereonto for breakage. The first portion of purged gas exits the first contactor at a first outlet of the first contactor. A first signal may be generated to display a representation of the display to a user, and a selection of a display element may be received from the user. The low-temperature water and the high-temperature water are mixed in the fluid-mixing region M downstream of the reducer 5.