Guidelines of Good Manufacture Practice (GMP)for Veterinary Drugs Manufacturers Article 19

The surface of the equipment which contacts directly with raw materials, in process products, intermediate products or products shall be made of a material with no property of reaction, liberation or adsorption. The objects required by the operations such as lubricant or coolant may not contact any of raw materials, product containers, seals, in process products or products.
中文原文 動物用藥品優良製造準則第19條
直接與原料、半製品、中間產品或產品接觸之設備表層,應以不具反應性、釋出性及吸附性之材質構成;任何作業所需物品如潤滑劑、冷卻劑等,均不得與原料、產品容器、封蓋、半製品或產品接觸。

English translation for reference only; the Chinese text prevails. Not legal advice.