七十年代以来,美国制造了一种生产双T板、单T板和平板等预应力混凝土构件的自动式混凝土摊铺机。后由日本乌居商会从美国机械工程技术公司引进,由山田机械工业有限公司承办销售业务。 这种摊铺机有两种类型;一种是制造双T板用的TT800型;一种是制造平板用的FS1200型。这种摊铺机,是由摊铺螺旋绞 Since the 1970s, the United States has produced an automatic concrete paver that produces prestressed concrete elements such as double T plates, single T plates, and flat plates. Afterwards, Japan Uji Chamber of Commerce was introduced from American Mechanical Engineering Technology Co., Ltd., and Yamada Machinery Industry Co., Ltd. organized the sales business. There are two types of paver; one is the TT800 type for manufacturing double T plates and the other is the FS1200 type for flat plates. This paver is spirally twisted by a paving