jìndùxìshù
ㄐㄧㄣˋ ㄉㄨˋ ㄒㄧˋ ㄕㄨˋ
Simplified 劲度系数
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 勁度係數 and it comes back until you know it.