纺缍形苹果树，每年秋季都有大量的拉技开角作业。所用材料，一是用木棍史撑开角，二是用绳索拉核开角，三是用砖头等物坠技开角，但都有不足之处。用木棍支撑开角，在平原果园或大面积果园，不容易找到那么多支棍，使用刺槐技、杨树枝和苹果枝做支棍，容易传染转致病和腐烂病 Spinning apple tree, every autumn has a large number of pull technology open angle job. Materials used, one with the stick history open angle, the second is pulling the nucleus open angle, the third is the use of objects such as bricks fall open angle, but there are deficiencies. Support the open angle with a wooden stick, in the plain orchards or large area orchard, it is not easy to find so many sticks, the use of acacia technology, poplar branches and branches of apple sticks, easy to transmit disease and rot disease