butt contact

基本解释

Butt contact and angular contact welding seam corrosion detection sensors were designed respectively.
分别设计了适合对接和角接焊缝腐蚀检测的两种传感器。
A line-type contact between the butt ( 18 ) and the guide track ( 7 ) is achieved, which reduces wear.
得到了针踵（18）和导轨（7）之间的线- 型接触，其减少磨损。
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End face with a gap, no boss butt is refers to the upper and lower casing left a certain gap between the upper and lower main chord rod end face at the same time contact.
端面有间隙、带凸台对接外形是指在标准节上部主弦杆上焊有定位凸台，定位凸台伸人另一标准节主弦杆内，上、下套管之间留有一定间隙配合定位。

First I go over the physical posture you should have because when you're sitting like we usually sit on the round cushion or the floor, re free of contact with people usually both your knees and your butt are for the kneeling.
首先理顺应有的身体姿势,因为打坐时,像我们常会坐在圆坐垫,或地板上，你要确定自己身旁不要有人，you，make，sure，you‘,通常两膝和臀部都要注意,都要碰到地面。
普林斯顿公开课 - 人性课程节选