Stable top quality is depended upon stable quality of raw material. 毛条质量的稳定性取决于每一次所用原料质量的稳定性。
Undetected changes in raw materials specifications, or subtle changes in manufacturing procedures, may affect the stability of BPCs. 原料质量标准中未发现的变化,或制造工艺中微小的差别,可能会影响原料的稳定性。