[机] actual throat of fillet weld

tián jiǎo róng jiē de shí jì xié hoù ㄊㄧㄢˊ ㄐㄧㄠˇ ㄖㄨㄥˊ ㄐㄧㄝ ㄉㄜ˙ ㄕˊ ㄐㄧˋ ㄒㄧㄝˊ ㄏㄡˋ