只需按下信号源搜索 Source Search

按需分配 distribution according to needs; to each according to his needs ; distribution according to needs

按需代码 code on demand

按需印刷 POD ; Print on Demand ; on-demand printing ; printing on demand

按需订货法 Lot for Lot

按需气流 demand flow

按需付费 pay-as-you-go ; pay-as-you-grow ; pay-for-use

按需供气阀 demand valve

按需 As Needed ; demand-based

按需定制 Make on demand ; MADE FOR YOU ; on demand