Drop transfer in the process of MIG welding is very complicated and quality of weld line is easily impacted by welding parameters coupled with each other.

MIG焊过程熔滴过渡过程复杂，影响焊接质量的参数多，相互间耦合性强。

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Fox's contract is up at Bloomfield Road on 30 June and he has now opted to drop down a division on a free transfer.

BBC: Blackpool's Fox off to Colchester

That uncertainty has fueled a lucrative business for estate planners as the amount that their clients could transfer to subsequent generations tax-free kept threatening to drop, but only went up, as noted here.

FORBES: Morphing Into The New Age Of Estate Planning