( 4 ) it is the largest area of the danxia landfonn of the northwest of the yunnan province in china . there are three landscape areas include liming scenery spot , luoguqing scenery spot and shibaoshan scenery spot . it takes three scenery spots as a action research for analysis of the zig - zag pattern caused by joints , weathering , tectonic activity and magma activity 第四，针对中国最大的丹霞地貌分布区?滇西北，以黎明黎光、罗古箐、石宝山丹霞地貌景区进行实证研究，初步分析了滇西北丹霞地貌发育的特点?大面积的龟裂现象主要由两组节理和风化作用形成的，构造、岩浆活动也对龟裂的形成起了一定作用。
However , single types are difficult in sewing heavy material and more materials once , it ll cause poor stability feeding and much attrition . in order to ensure zig - zag stitch , linking stitch , locking stitch . wemust adopt double type . needle plate and presser foot of double type should be changed together if you want to use double tye istead of single type . the size of their scres and installs are all - purpose 有时为了保证曲折线缝拼缝锁边等缝纫要求,就要采用双长型送布牙,如果要想把单长型改换成双长型时,必须同时更换双长型的针板和压脚,其螺钉和安装尺寸是通用的
At the same time , taking the tcp and ppp into account which are the bases of the underlayer of gnutella protocol , we use the thought of data flow for reference which is widely applied in the internet . we modify the zig - zag algorithm in order to help f - measure algorithm manage network connection 同时，考虑到gnutella协议其下层的连接大多是基于tcp和ppp协议的，因此，本文还借鉴了当前internet上广泛使用的数据流控制方法? ? zigzag算法，并对其进行了改进，使其能够更好的辅助f - measure算法进行gnutella网络的连接管理。
