operation elements的用法和樣例：
例句
- The key technological operation in the process of soft full grain calfskin upper leather was discussed in this paper.
介紹了牛犢全粒面軟鞋面革的特點(diǎn)和制作過(guò)程中的技術(shù)操作要點(diǎn)。 - This article summarized the experimental technology and operation outline of the paper electrophoresis for amino acid based on abundant experiments.
摘要在大量實(shí)驗的基礎上總結出氨基酸紙上電泳實(shí)驗技術(shù)和操作要點(diǎn)。
