Nako ea poso: Apr-13-2024 E fetileng: 2024 China High-qetellong Welding phala thepa Technology Seminar e ile ea tšoaroa ka katleho Shijiazhuang E 'ngoe: Mohlahisi oa mochini o tsoetseng pele oa ho etsa lipeipi tsa erw oa ZTZG-China