| 摘要 |
PROBLEM TO BE SOLVED: To reduce noises generally in a concrete crushing process. SOLUTION: The low noise concrete crusher with nail-like teeth is supposed to reduce noises by effectively crushing a concrete. More particularly, reducing the cross-section of the crusher tooth enables the tooth to pierce the concrete with less force. The crusher is also designed to make the teeth pierce the concrete slantingly to the concrete surface so as to crush the concrete with a tensile load. COPYRIGHT: (C)2004,JPO&NCIPI
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