[Uncle Rocket] Why are all excavators yellow?# Engineering Vehicle# Excavator# Beauty of Machinery#

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Science and Technology Culture-Technology And Culture: • 科技文化-Technology And Cu...
Life Science Popularization-Life Science: • 生活科普-Life Science
Animal Science-Animal: • 动物科普-Animal
Dry Goods Explanation: • 干货讲解
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Gizmos: • 小玩意
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Astronomy-Astronomy: • 天文学--Astronomy
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Science Rocket Uncle# Science Popularization# Culture

[@g863210xie]

黃黑本來就是一種生物警戒色，黃黑相接的動物通常有劇毒。

[@tangtienji]

既然這麼好的幫助安全的顏色，為什麼其他車輛，例如火車，不用呢？

[@user-bg6gk5jy7w]

美国很多货运火车是黄色。但是其他国家为了战略安全长期都是绿色。现在涂成绿色已经无用了，火车平交道也减少了黄色也不必要了，所以就随便什么颜色了。

[@rogerpei1688]

塗了啊 但煤灰又塗黑了

[@yaoh2661]

電磁波白話：對電感施加交流電產生不斷變化的磁場

[@william_maple5923]

但在台灣，黃色通常是伴隨著悠揚的一起出現的😂

[@boanchen589]

Wirtgen 白底+橘 綠色 藍+白

[@boanchen589]

Sennebogen 綠色

[@coollerl578]

神钢有蓝绿色的啊

[@boanchen589]

Liebherr 礦山機械 是白灰色

[@user-kn5hs6ro2y]

星期一、三、五的直播是在yt上嗎？

[@A099VD_TW]

因該是b站

[@rogerpei1688]

黃黑色 醒目危險

[@user-gj2uu9wc6j]

但也有绿色的啊😂

[@dr_simhh]

疯了吧，现在还有人看50分钟的视频吗

[@user-kn5hs6ro2y]

願意看得還是會看