Two pairs of hands, and one thing passing from the first pair to the second. Someone lets go, someone else takes hold, and from that moment the second pair is holding it. What passes can be an object, or control, or the facts you need to do the job. The picture does not change; only the thing in the hands changes.
handover 可以想成兩雙手之間傳過去的一樣東西。一邊放手，一邊接住。從那一刻起，東西就在另一邊了。傳過去的可以是實體的物品，可以是「誰說了算」，也可以是「你該知道的事」。畫面一直都一樣，只是手上那樣東西換了內容。
From the word’s history
The noun comes straight from the verb phrase hand over, so the hands in the picture are written into the word itself.
Wiktionary 記錄 handover 是從動詞片語 hand over 直接變成的名詞。所以「一手交、一手接」不是我們加上去的比喻，它本來就寫在字裡面，也因此還看得到 hand-over 這種寫法。
Wiktionary, packet source_ref kaikki:3f6f69a190036ae4:1432656962:13843 — etymology_text: Deverbal from hand over.
登入就可以看每一支怎麼連回核心畫面。