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0
2024-02-10 11:29:27
Cần đảm bảo các phương tiện an toàn chống cháy nổ
+Sử dụng bếp ga có khóa ga tự động
+Có phương tiện chữa cháy ở nơi có sử dụng nhiều chất đốt
+Nhớ tắt bếp khi ngừng đun nấu.
2024-02-10 11:19:33
vận tốc truyền âm trong chất rắn là lớn nhất sau đó đến chất lỏng rồi đến chất khí
2022-02-07 08:47:40
2022-02-07 08:47:40
2022-02-07 08:47:40
2022-02-07 08:47:40
2022-02-07 08:47:40
2022-02-07 08:47:40
2022-02-07 08:47:40
2022-02-07 08:47:40