The water droplet generating system includes a vessel, an openingclosing valve, a moisture absorbent member, and a condenser portion. A signal dividing section divides a multiplexed signal to generate a plurality of divided signals in the STS or STM transmission interface format. At least a portion of the lock mechanism is provided within or adjacent to the sill. An oil circuit connector plug is removably installed in a socket in the head, the plug defining a connector passage that mates up with an oil supply conduit in the engine cylinder head and with an oil supply passage in the center housing such that oil is conducted from the oil supply conduit through the connector passage to the bore. This configuration allows the crate to collapse more compactly than those in the art. The invention is usable in a computer-to-plate process to produce flexographic relief image printing elements.