由长治锻压机床厂试制的W12-25×2000A、W12-20×2000A型四辊卷板机、W27Y-159×14A型Φ159×14mm液压弯管机于1986年底通过省级鉴定. 两种四辊卷板机的新产品设计合理、结构紧凑、操作方便,吸收了引进国外机型的优 W12-25 × 2000A, W12-20 × 2000A type four-roll plate bending machine and W27Y-159 × 14A type Φ159 × 14mm hydraulic pipe bending machine trial-manufactured by Changzhi Forging Machine Tool Plant passed the provincial appraisal at the end of 1986. Two kinds of four-roll Bending machine new product design is reasonable, compact structure, easy operation, the introduction of foreign models to absorb the excellent