... 斑点speck 熔洞fusion hole 坯粉body refuse ...
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Firstly, how PCF's air-hole structures varied along with the applied fusion power was observed by changing fusion parameters, such as fusion time and current.
方案结合实验测量与理论计算，首先通过改变熔接时间、熔接电流等参量，考察了不同熔接功率对PCF端面气孔结构的影响。
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