法国于阿尔公司生产的A 系列翻转犁装有新式安全机构,图1为四铧变型,两铧和三铧也可带这种安全机构。系列犁的铧尖距为900毫米,犁架高度为660毫米。图2表示犁体遇到障碍时如何向上抬起。拉杆装在矩形管梁里面,其前端铰接于犁架,后端装有螺旋弹簧,犁体越过障碍后可自动回位。四铧犁的重量为1190公斤,与70～100马力的拖拉机配套。 A series of flipping plows from France, produced at Alcor, are equipped with a new safety mechanism. Figure 1 shows a four-piece variant, which can also be used with the two-piece and three-piece models. The pitch of the series plows is 900 mm and the height of the plow frame is 660 mm. Figure 2 shows how the plow body lifts up when it encounters an obstacle. The drawbar is housed inside a rectangular tube beam, the front end of which is hinged to the plow frame and the back end is provided with a coil spring. The plow body can be automatically retracted after passing over the obstacle. Four plow weight of 1190 kg, and 70 to 100 horsepower tractor.