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Wide gap weld (wgw)
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An aluminothermic weld where the initial gap between the rails is greater than 40 mm. generally, the gap is in the order of 60 to 70 mm.
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Standard gap weld (sgw), английский
An aluminothermic weld where the initial gap between the rails is up to and including 40 mm. generally, the gap is 20 or 25 mm.
Standard junction weld (sjw), английский
An aluminothermic weld used to weld dissimilar rail sections using an initial gap of up to and including 40 mm. generally, the gap is 25 mm.
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