三层复合底，受热均匀。
双复合底护框，以提高灵活性和增加的冲击保护。
Dual compound toe-box for improved flexibility and increased impact protection.
三层真空复合底，比普通焊接复合底更耐用，煤气炉等明火炉灶使用；
III. Tri-ply vacuum base, more stronger and efficient heat conduction, can use on gas or electric ranges;
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