expansionaryadj.扩张性的expansionn.膨胀；扩展；扩充expansion hand reamer膨胀式手用铰刀expansion stay-bolt伸缩撑螺栓expansion coefficient膨胀度,膨胀率expansion compensator膨胀补偿器expansion deformation松胀变形expansion screen pipe膨胀筛管expansion in capacity扩容Expansion of resources资源扩容expansion stuffing box膨胀填料函,膨胀填料盒expansion valve piston伸缩式阀活塞