Mavavu m'mafakitale osiyanasiyana osiyanasiyana ntchito, makamaka petroleum, petrochemical, mankhwala, zitsulo, mphamvu yamagetsi, kusungira madzi, zomangamanga m'tawuni, moto, makina, malasha, chakudya ndi zina (omwe, makina ndi mankhwala makampani. ogwiritsa ntchito msika wa valve ndi ...
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