一种加热时柔软流动而冷却即凝固的富含虫胶和松脂的树脂品，用于给信件、电池或罐子封口。
A resinous preparation of shellac and turpentine that is soft and fluid when heated but solidifies upon cooling, used to seal letters, batteries, or jars.
所述程度的运动足以使得包括所述强化物的所述树脂在凝固后的机械性质处于最佳范围内。
The degree of motion being sufficient enough so that a mechanical property of the resin including the reinforcement once solidified is within an optimum range.
即计量太小注射速度太小导致充填结束之前树脂凝固。
Injection speed may be too slow causing freezing before mold is filled.
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