GB/T31556.1-20153.6阀口长length of valve3.6.1缝合袋阀口长length of valve for sewn sacks袋外部边缘与阀口或阀套内部边缘之间的距离,平行于袋底方向从袋中间测量。3.6.2六角形端部糊合袋阀口长length of valve for pasted hexagonal bottom sack袋外部边缘与阀口或阀套内部边缘之间的距离诚去1/2袋底宽,平行于袋底方向从袋中间测量。3.7阀套长length of valve sleevei内套式或外套式阀套平行于袋底方向的纵向尺寸。3.8缝合线边距sewing line distance缝合线与袋底边的距离,垂直于缝合线测量。3.9翻转糊合长度length of closure turn over翻转底糊合开口袋开口瓣的长度,垂直于制合线从袋中间测量。4尺寸描述4.1开口袋4.1.1平边缝合开口袋平边缝合开口袋尺寸见图1。说明:a一袋长,b袋宽n一缝合线边距.图1平边缝合开口袋尺寸示意图