Some mothers would seal the knot with wax and their ring.
有些母亲会使用蜡和戒指将绳扣封死。
Trace the ring with your finger to apply the wax.
用手指沿着环状涂抹车蜡。
One of the key-technologies of guiding device investment casting is getting internal ring, external ring and blade unit by splitting integral guiding device part for wax-mold design.
导向器类零件分体式精铸的关键技术之一是切分得到蜡模模具设计的内、外环及叶片单元体即如何实现分割面的生成。
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