铜雕牛制作工艺比较复杂，每个产品制作的过程需要很多时间来完成，模具成型以后的后期修整全部有手工完成，因此铜雕牛产品不会像机器流水线上作出来的那么精细。所以重量会有误差，每人测取尺寸方式不同，如有细微的划痕沙眼，接口处保定平面设计培训  防撞墙模具 防撞墙模具 防撞护栏模具 大棚遮阳网 遮阴网有痕迹，铸造字迹不清晰等问题，属于铜器行业中正常现象。
Copper carving cattle production process is more complex, each product production process takes a lot of time to complete, after the mold forming, all the finishing is done by hand, so the copper carving cattle products will not be as fine as those made on the machine assembly line. Therefore, there will be errors in weight, and each person has different measurement methods, such as fine scratches, traces at the interface, unclear casting handwriting and other issues, which belong to the normal phenomenon in the copper industry.
自古风水铜器由于成本限制，都是空心倒模铸造，基本都是中空的，内壁会有磨具残留，在运输过程中会将残留震落一部分，晃动里边会发出异响属于正常。
Since ancient times, due to cost constraints, Fengshui copper wares are all hollow inverted casting, basically hollow, there will be abrasive remnants on the inner wall, in the transport process will be part of the residual shaking, shaking inside will produce abnormal sound is normal