What is this thing 是 reddit 上的一个社区（community），上面时不时会有人发一些没见过的玩意来提问。
一起来看看吧！
瓦片
Q: Slave Tile?? Found at an antique store in Orlando. WITT
奴隶瓦片？在一家奥兰多的古董店里找到的。这是个嘛？
A: Tiles of this type were reportedly made and used by slaves in Georgia as grave markers and garden tiles.
据说，这种类型的瓦片是乔治亚州的奴隶制造的，被用于墓碑和花园的瓦片。
被裱起来的电路板
Q: Framed old circuit board. Belonged to my great uncle. I’m curious to know what it was used for and why it might have been framed.
被装裱起来的旧电路板，属于我的叔公，我很想知道它是做什么的，为什么要被裱起来。
A: ml747m seems to be an op amp. date code is 1973. so it is some sort of analog circuit. maybe your great uncle designed it. i have many of the boards i have designed mounted in frames and hanging on the wall.
ML747M 看起来像一个运算放大器，日期代码是 1973。所以这应该是某种模拟电路。或许这是你的叔公设计的。我设计的很多板子都放在框架中挂在了墙上。
组装带
Q: “Assembly tape” on my Pop-Tart this morning. It’s also on the inside of the wrapper.
早上在「Pop-Tart」上发现的组装带，在包装袋的内部也有。
A: Splice from film change on flow wrapper during processing. When one roll of “wrapper” is exhausted the next roll is taped to the tag end to run it through the equipment. High visibility tape typically ensures it is removed downstream in the production process.
这种胶接来自包装生产线的上薄膜的变化，当一卷组装带用完时，下一卷组装带粘贴到标签端使其穿过设备。这种看起来非常明显的胶带，通常可以确保在生产线下游发现并移除他们。
铁片
Q: Found metal detecting outside of an old church.
在一座老教堂外边发现的铁片。
A: It looks like a Ferrotype photograph. They started being used in the 1850s’s.
这个看起来像一个铁板照片，在19世纪50年代开始使用。
天花板上的钥匙
Q: Key in the ceiling at school
学校天花板上的钥匙。
A: This could be to test duct detectors in a fire alarm system. Duct detectors will shut off the air conditioning unit if it senses smoke to prevent it from circulating the air.
这个可能是为了测试火灾报警系统中的风管探测器，如果风管探测器检测到烟雾，它将关闭空调，防止空气流通。
https://www.reddit.com/r/whatisthisthing/comments/ir4ivm/key_in_the_ceiling_at_school/
谷歌地图
Q: Found on Google maps in the Yukon/Delta region in Alaska, went back to look for it agaun after screen shot but couldn’t find anything. What is it?
使用谷歌地图在阿拉斯加州的育空三角洲地区的找到的，截图下来继续查找，没有任何发现，这个是什么？
A: Here it is
Here’s some information on it. Decommissioned LORAN array.
一个正式停用的远距离无线电导航系统阵列。
（译者注：英文缩写 LORAN，为「Long Range Navigation」（远程导航）的缩写，中文音译为「罗兰」或「劳兰」，是在二战期间由美国开发的一种无线电导航及授时系统。目前已衍生了多个版本。）
钟
Q: Weird old bell found in the Hudson Valley.
哈德逊河谷发现的怪异的古钟。
A: Dutch East Indian Nautical bell?
荷兰东印度航海钟？
A: Vereenigde Oostindische Compagnie
荷兰东印度公司
https://www.reddit.com/r/whatisthisthing/comments/iq3ij4/weird_old_bell_found_in_the_hudson_valley/
