金 +5 = 13

鉚ㄇㄠˇmǎo

ㄇㄠˇmǎo
  1. 參見「鉚釘」條。
英to fasten with a rivet; to rivet, to hammer in a rivet, (coll.)​ to concentrate one's strength
德nieten, zusammennieten (V, Tech)​
法riveter