The liquid to be delivered leaves a container (3A, 3B) maintained at a first overpressure P1, from where it is transferred to an intermediate storage tank (11) maintained at a predetermined intermediate pressure P2>P1. Several small-volume delivery containers (12A, 12B), each of which may be pressurized...http://www.google.com.tw/patents/US6267132?utm_source=gb-gplus-share專利 US6267132 - Liquid delivery system and its use for the delivery of an ultrapure liquid
