Bác daotu phân tích thấy pro quá nhỉ. Chắc là chuyên môn về vật lý hay cơ khí gì đúng không ?
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Đỗ Nguyễn Vũ
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MỖI KHI ĐI XA PHẢI ĐƯỢC SỰ ĐỒNG Ý CỦA VỢ
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