When doing a grooving and hammer breaking experiment on a sample in the technology assess teal of fibrin root welding, find that fibrin backing weld will easily produce a special root incomplete fusion flaw.

• 摘要在进行一次纤维素根焊的工艺评定试验的过程中，对取样进行刻槽锤断实验时，发现采用纤维素打底焊容易产生一种特殊的根部未熔合缺陷。