Ke hobane'ng ha mochine oa motlakase oa valve o bonahala o le boima bo feteletseng? Mekhoa ea ts'ireletso ke efe?
Ke hobane'ng ha mochine oa motlakase oa valve o bonahala o le boima bo feteletseng? Mekhoa ea ts'ireletso ke efe? Petrochemical, seteishene sa matla, metallurgy le liindasteri tse ling li hloka ts'ebetso e tsoelang pele, e boreleli, e telele ea potoloho. Ka hona, ho hlokahala hore tšebeliso ea valve e be le ...
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