单词	vacancy annihilation
释义	vacancy annihilation un.空位湮没
随便看	sprinkler alarm sprinkler alarm gong sprinkler alarm valve sprinkler alarm valve clapper sprinkler alarm valve retard chamber sprinkler alarm valve water motor alarm sprinkler alarm valve water motor transmitter Sprinkler and irrigation technology sprinkler and micro-irrigation sprinkler and sprinkling machine sprinkler apparatus sprinkler bar sprinkler bead sprinkler block sprinkler body sprinkler boil resistance sprinkler box sprinkler car sprinkler coefficient sprinkler collocation sprinkler configuration sprinkler connection sprinkler contractor service sprinkler control sprinkler control valve