| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a bar type spacer is now frequently used in the work of steel bars because of its high work efficiency but that the high price of the bar type spacer afflicts users. SOLUTION: The added value of the single spacer made of a synthetic resin is increased by being formed in an distinctive shape which can retain a setup reinforcing bar and a lower end reinforcing bar. Thus, the total cost which the user have to bear can be reduced. COPYRIGHT: (C)2006,JPO&NCIPI
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