products requiring high-precision techniques

粗加工制成品

simple-to-manufacture products

虽然我们的周围都有钢铁制品，我却不知道它们是怎么样加工成形的。

Although iron and steel products are all around us, I do not know how they are formed into various form.

电木，酚醛树脂一种商标，用于存在于各种加工制造物品中的任何一种合成树脂或塑料制品

A trademark used for any of a group of synthetic resins and plastics found in a variety of manufactured articles.