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The potable water expansion tank shall be of drawn steel construction.
这种饮用水膨胀罐应该是拉制钢结构。
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The five characteristics of cold-drawn steel industry status are expounded.
分析了冷拔钢材行业现状的五大特点。
Lifts and service lifts. drawn steel wire for elevator ropes. specifications.
载客电梯和货梯。电梯缆索用冷拔钢丝。规范。
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