... , the end part of high accuracy has in advance curved, no back angle when bending Continuously Main characteristic:1.The ... . lower NC)= few kind , plenty of prodductons use.7.Rich curved shape, have rctling O ype, U type and multistage R ... ,scope O type bending; rear curved way ,U type bending; front curved way, multistage R bending: comblned -type way ...