一、分组法简介:如图2所示。如在图1中用两条黑线沿网片上边a处和b处斜线画下来,那么,网片小头目数和大头目数之差是两条黑线外的左右两旁的网目数,究竟是有规则的存在着,还是无规则的存在着?图2中,左边网片剪裁比是2:3,剪裁组数6组;右边网片剪裁比是4:3,剪裁组数为4组。左 First, the packet method Description: as shown in Figure 2. As shown in Figure 1 with two black lines along the top edge of the screen at a and b slash down, then the mesh head and the head of the head is the difference between the two black lines outside the left and right sides of the mesh , Is there a rule exists, or there is no rules? Figure 2, the left side of the screen cut ratio is 2: 3, cut the number of 6 groups; the right cut ratio is 4: 3, cut the number of groups 4 groups. left