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