8 Years
WL20 2% Lanthanated - Màu xanh (Không phóng xạ) Vật liệu điện cực vonfram WL10 WL15 WL20, WT20,2% Thoriated, 2% Ceriated WL20 2% Lanthanated - Цэнхэр (цацраг идэвхт бус) вольфрамын электрод материал ...
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