词汇	金字塔结构
释义	金字塔结构医pyramid structure
随便看	Double-shoulder circuit locomotive routing double-shouldered double-shouldered point double shoulders-circuit locomotive routing double shoulder springbar double shoulder spring bar double shoulder stand Double-Shoulder Task double shoval cultivator double shovel double shredding double shrinkage double shrouded impeller double shrouded-impeller double-shrouded impeller doubleshrouded impeller type sand-pump double shrouded impeller type sandpump double shrouded impeller type sand-pump double shrouded wheel double shuffle double shut double shutter double shutter gate double sickle cutterbar double sickle mower