A plumbing device for coupling a urinal to a soil pipe is provided. The acid-amplifier produces an acid during a post-exposure-bake, which is induced by an acid generated from a photo-acid generator at the exposure process so that a line edge roughness of the photoresist pattern and photoresist energy sensitivity are improved. Intact molecules of DNA are transported to the reaction nanochannel and then fragmented in the reaction nanochannel using restriction endonuclease enzymes. Controller is configured to direct light from first light beam to an image projector during first time intervals and to direct light from second light beam to an image projector during second time intervals. The present invention effectively reduces a burden of a network server.