fastening tool
... fracture initiation 破裂初始特怔 fastening tool 扣紧工具 flight of steps 楼梯阶段 ...
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... ffurthermoretening devices 稳固装置 ffurthermoretening tool 扣紧工具 fon concrete 富混凝土 ...
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本实用新型的螺栓只能在封盖扣紧前上紧固定，用任何工具都不能拆卸，所以防盗性能更可靠。
The bolt of the utility model can only be tightened and fixed before the enclosing cover is fastened and can not be dismantled with any tool; therefore the burglar resistant property is more reliable.
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