Cold copper

寒铜───Cold copper

cold state, excessive small gap in partial zone can cause free-clearance under thermal expansion effect and cause the copper bushing damaged.───冷态下局部过小间隙还会造成热膨胀状态下无间隙而使铜套受损。

Material is: cold rolling, stainless steel, copper, bronze profile.───材质有：冷轧钢，不锈钢，铜，铜型材。

Then, we glued it again, and added some ice on the cold copper of engine, but the problem of gas-tightness didn't be figured out. And, camshaft is not good enough.───后来，我们再用胶水补好，冷却板也加了冰块，但是气密性的问题还没有解决，另外，凸轮轴也做得不够好。