Sometimes there are other defects in the joints such as inclusion, incomplete fusion and penetration, undercut.

另外,在有些情况下还容易产生夹杂 、 未熔合和未焊透 、 咬边、下塌等缺陷.

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Furthermo re, the zinc vaporating and oxydizing cause air bubble, incomplete fusion and cr ack.

锌挥发和氧化会导致气孔 、 未熔合及裂纹.

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Furthermo re, the zinc evaporating and oxidizing cause air bubble, incomplete fusion and cr ack.

锌挥发和氧化会导致气孔 、 熔合及裂纹.

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