连续环剥或过量应用PP 333加重轮纹病的发生。
Continuous circular peeling and surplus application of PP333 aggravated the disease.
为研究对象，对其主干进行大面积环剥，田间连续观察剥面愈合率和树干外观变化，寻求有利于新皮发生的技术措施。
Through observing the healing rate and changing of trunk appearance after large-area skinning in succession in the fields, some technical measures to help to develop new bark were sought.
介绍了涡流纺纱的基本原理，对涡流加拈器中旋转流场的形成、纤维环的凝聚与剥取做了重点阐述。
This paper introduced the basic principle of air vortex spinning and laid stresses on curl flow field in the air vortex twister, and the collecting and taking off of link fiber in air vortex spinning.
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