Akselerasi Transformasi Digital di Indonesia
The advantages of copper tools over stone, bone and wooden tools were quickly apparent to early humans, and native copper was probably used from near the beginning of Neolithic times . Eventually, the working of metals led to the discovery of alloys such as bronze and brass . The first use of iron alloys such as steel dates to around 1,800 BCE.
- Apprenticeships Work towards becoming a qualified journeyperson in any one of our 30+ apprenticeship and pre-employment programs.
- As a member, you’ll also get unlimited access to over 84,000 lessons in math, English, science,