This is what a spacer looks like.

这就是垫样子。

We don't have to shim or glue.

我们不需要垫或胶水。

We can control the fitting clearance by adjusting the thickness of the shim .

我们可以通调整垫厚度来控制配合间隙。

Interchangeable thumb inserts can break and come out mid-release and they can really hurt your thumb joint.

可互指垫在释中可能会断裂并脱落，这真会伤到你指关节。

So it's two very small pieces of metal, essentially little metal pads that contact the cardiac tissue directly.

因此，这是两块极小金属，实质上是直接接触心脏组织小金属垫。

And when we construct a ray diagram for a diverging lens, there are a few key differences.

当我们为 镜头垫，有几个关键区别。

So he did timing chains and guides and did head gaskets and all that, and it still doesn't run right.

于是他更了正时链条和导轨， 还做了缸盖垫等，但车子依然运转不正常。