Nts'etsopele ea indasteri ea li-valve ha e arohane le taolo ea boleng
Nts'etsopele ea indasteri ea li-valve ha e arohane le taolo ea boleng Li-valve ke lisebelisoa tsa bohlokoa tsa taolo ea mokelikeli ho petroleum, lik'hemik'hale, seteishene sa matla, metallurgy le liindasteri tse ling. Ka ho teba ha ho ikopanya ha lichaba tsa moruo, bareki ba na le ...
lintlha tsa pono