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tranvuminhchau
2 năm trước
tại sao cấu tạo của nhiệt kếThủy ngân và nhiệt kếRượu không có đoạn thắt nhỏlại ởnơi tiếp giáp giữa ống mao quản bên trên và bầu nhiệt kếbên dưới như nhiệt kếy tế?. Mong m.n giúp mình với
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