爱丽丝是裆坡的延伸，它的主要功能是满足人类活动的需求，在日常生活和工作中，人体弯腰、蹲、跨、跳、走、等作用（见图表12），影响上层裆的自然延伸，所以在爱丽丝作为裤裆必不可少的部分。所谓的后裆坡，指垂直线、中裆裤后，从定理边坡的裆后，由相互区别和臀围的裤子腰围决定的，在同等条件下臀围，腰围越大，裆坡度小：腰围小。座位越大（见图13），导致爱丽丝后变化，爱丽丝后水平坡度后裆决定）。



爱丽丝高度设计后一般控制在3～6厘米以内，但也有其自身变化的条件，它的斜率越大，爱丽丝越高；斜率越小，爱丽丝越小（见图14），爱丽丝和斜率就越是一致。坡度、缝长后裆倾角增大的同时，边缘臀部有更多的能力也会增加活动。




爱丽丝的选择后，根据大小和习惯需要处理，有时也会产生这样的矛盾，腰部和臀部接近甚至相等，裆坡和爱丽丝高度分布是有限的，这就需要在前面的变化和裤子后，增加的比例，因为前任，所有的脂肪，脂肪，心脏，腹部饱满，确保正常后裆坡度、平衡的腰部和臀部。总之，任何形状的后角，必须掌握超过90度直角，最佳状态为92度，与nbsp94度为宜（见图15），以确保后裆、腰平。

Alice is the extension of the crotch slope, the main function of it is to meet the demand of human activities, the human body in daily life and work, the stoop, squat, cross, jump, walk, wait for action (see chart 12), which affect the upper crotch natural elongation, so after Alice it as part of the trousers crotch essential. The so-called back crotch up slope, refers to the after perpendicular line and the middle crotch pants, look after the crotch of the slope from the theorem, is decided by the mutual difference and hip pants waist, hip size in the same conditions, the larger waist circumference, crotch slope is small: waist circumference is small. The seat is bigger (see chart 13), resulting in changes after Alice, Alice after the level of slope after crotch to decide).
After Alice height has been designed to control in general 3--6 cm) within, but it also has its own changing conditions, it is the law of the slope is larger, Alice is higher; the slope is small, after Alice is smaller (see chart 14), it is said after Alice and slope is agree with each other. The slope, seam length after crotch inclination increase at the same time, margin buttocks have more capacity will also increase activity.
After Alice level selection, according to the size and habit needs to deal with, sometimes also can produce such contradictions, the waist and hips close to or even equal, crotch slope and Alice height distribution are limited, which would require a change in the front and back of the pants, increase the proportion of the predecessor because, all fat, fat, heart, abdomen is full, to ensure the normal back crotch slope, the waist and hip balance. In short, any shape of the rear angle, must grasp more than 90 degrees right angle, the best state to 92 degrees -&nbsp94 degrees is appropriate (see Figure 15), so as to ensure the back crotch and waist flat.


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