bond line

基本解释

The result shows that the bond between surfacing weld and base metal is metallurgical bond, and bond line is clear.
结果表明，喷焊层与基体是冶金结合，结合线清晰。
In welding test of TCS stainless steel, it was found that impact absorbing energy of heat-affected zone(HAZ)near bond line in welded joint was low.
在TCS不锈钢前期焊接试验中发现其焊接接头热影响区的冲击吸收功值在熔合线附近较低，原因是接头热影响区晶粒粗大所致。
The longitudinal cracks along bond line and the transverse cracks which cut across the weld metal cross section inside weld metal were formed, while X65 pipe line steel was welding.
X65管线钢在焊接过程中，内侧焊缝金属出现横向和纵向沿熔合线方向的裂纹，横向裂纹贯穿焊缝金属横截面。

So we have h, then we can draw our bond as a line.
那么我们有氢，可以把我们的键画成一条线。
麻省理工公开课 - 化学原理课程节选
But since in drawing Lewis structures actually, in some cases you do, you can draw a dotted line that means a 1 and 1/2 bond, but most in most cases, we just draw out both resonance structures, and the way that we say it's a resonance structure is that we put it in the brackets and we put an arrow between it.
但是由于在画路易斯结构时,其实，在某些情况下是可以的，你可以画一条虚线来表示一又二分之一键，但是在多数情况下，我们就把两个结构都画出来，而我们说这是一个共振结构的表示的方法是,把它们放在括号里，并在中间放一个双箭头。
麻省理工公开课 - 化学原理课程节选

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In contrast, the yields on the Italian ten-year bond have just risen slightly (line b).
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