釘刺 くぎさ試験 しけんじゃありませんでした
kugi sashishi kenja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 釘刺し試験

1. Was not a nail penetration test.; Was not a nail puncture test.

Past/Perfective
Negative
Polite
Terminal Form