Johannes_Gutenberg
Logam
Zaman_Kanso
Baja
Zaman_Basi
Palu_(alat)
Obeng
Basi_tuang
Paek
Baja_nirkarat
Bor_(alaik)
Tang
Baut
Masin_pres
Aluminium_paduan
Palaburan_(metalurgi)
Pangacoran
Pitih_kartal
Baja_ringan