本衬垫可用于各种单面焊接工艺的位置，特别适用于不一定要求封底焊道的场合。
This welding backing is used with all one-side processes. Especially for those which do not demand back bead cleaning.
本衬垫可用于各种单面焊接工艺的位置，特别适用于不一定要求封底焊道的场合。
This welding backing is used with all one-side processes. Especially for those which do not demand back bead cleaning.
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