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| 1. | "In the 20th century, a single, hollow-core panel door became most common." |
| 在20世纪,表面光平、上开一个窗洞的木门成为最普通的形式。 |
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| 2. | Prestressed concrete hollow-core slabs |
| GB14040-1993预应力混凝土空心板 |
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| 3. | hollow-core construction |
| 空心结构 |
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| 4. | hollow core board |
| 空心细木工板 |
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| 5. | hollow core cable |
| 空心电缆 |
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| 6. | hollow core coaxial Ge Li detector |
| 空心同轴锗锂探测器 |
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| 7. | hollow core flush door |
| 空心门；空心平面门 |
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| 8. | The hard elastic core of a baseball;a rod with a hollow core. |
| 棒球的弹性硬心；空心钓竿 |
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