ballast covering
英：[ˈbæləst ˈkʌvərɪŋ] 美： [ˈbæləst ˈkʌvərɪŋ]
ballast covering 基本解释
释义道床层；
ballast covering 相关例句
权威例句
Toilet cistern with floor valve - has combined ballast-suction lifter, covering intakes in stand-pipe in bell-shapeMethod for covering a ballast bed with foam in a railway track systemThe Pressing Technology of the Ballast Covering and Die DesignBallast room cover for a light fixtureBallast bypass harness assembly for use with a light emitting diode fluorescent tube replacement bulbWind-resistant environmental synthetic coverCOVERING THE SPREAD : BY SPEEDING DISTRIBUTION, CONTROLLING FLOW OR PINPOINTING PLACEMENT, SUPPLIERS STRIVE TO MEET RAILROADS' BALLA...Recessed fixture housing having removable ballast boxNOAA Great Lakes Environmental Research Laboratory (GLERL) NOBOB Vessels as Vectors for Noninigeous Species ####Introductions to the...Behavior of geogrid-reinforced ballast under various levels of fouling
