溶接

1 user(daf7828ae1fd)  Mar 15, 2026, 12:31:22 AM Study time: 13 minute(s)
Today's learning: 17
Consecutive study days: 9
Difficult review: 1
リベット ベンチ作業 溶接

2 user(daf7828ae1fd)  Mar 8, 2026, 7:01:03 AM Study time: 17 minute(s)
Today's learning: 7
New: 74
Consecutive study days: 1
Difficult review: 1
ホース・チューブ 電気工作 溶接

3 user(daf7828ae1fd)  Mar 4, 2026, 5:35:59 AM Study time: 14 minute(s)
Today's learning: 26
New: 32
Consecutive study days: 49
Difficult review: 1
リベット 溶接 表面処理