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鉗口優(yōu)質(zhì)碳鋼鍛壓，調(diào)質(zhì)處理，齒部高頻，齒部硬度 55-60HRC，球墨鑄鐵柄。
Mobile jaw drop forged with high quality carbon steel, heat treatment with quench and tempering, hardness of teeth is 55-60HRC, globular graphite cast iron handle.
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