為什么攪拌車不安裝倒車影像？
不過仔細想一下，這個想法確實可以，因為很多時候，攪拌車司機都在倒車，在攪拌站接料的時候要倒車、給泵車送料要倒車、碰到狹窄的道路，很多時候都需要直接把攪拌車倒進去，我見過人家修路的，由于施工地點不能倒車，所以要把攪拌車倒進去，而且倒車長度大概在2公里左右，所以，按照你的問題所說的，如果能夠在攪拌車的尾部安裝一個倒車影響，這樣對于駕駛員來說，確實可以更加的清楚的知道車尾部的路況和各種障礙物。
However, if you think about it carefully, this idea is really OK, because many times, the mixer truck driver is reversing, reversing when receiving materials in the mixing plant, reversing when feeding materials to the pump truck, and directly reversing the mixer truck when encountering a narrow road. I have seen people who repair roads. Because the construction site can't reverse, they have to reverse the mixer truck, Moreover, the reversing length is about 2km. Therefore, according to your question, if a reversing influence can be installed at the rear of the mixer, the driver can really know the road conditions and various obstacles at the rear of the mixer more clearly.
但是，就是這樣一個可以提高駕駛員駕駛系數的裝置，為什么就沒有安裝呢？
However, why is such a device that can improve the driver's driving coefficient not installed?
首先是大車的用途，大車一般都是工程用車，拉的都是砂石料，用途比較粗放，倒車影像屬于電子元件，安裝以后不斷的裝卸砂石料會對倒車影像產生影像，可能用不了多久就會出現故障。
The first is the purpose of the cart. The cart is generally an engineering vehicle, pulling sand and gravel. The purpose is relatively extensive. The reversing image belongs to electronic components. After installation, continuous loading and unloading of sand and gravel will produce an image on the reversing image, which may fail in a short time.
由于水泥攪拌車的工作環境復雜，上下左右電線，水管，圍墻等等障礙物，加之放料時濺起的水泥漿也會把攝像頭覆蓋，所以一般倒車全憑駕駛員經驗！
Due to the complex working environment of the cement mixer, the obstacles such as up, down, left and right wires, water pipes, walls and so on, and the cement slurry splashed during discharging will also cover the camera, so generally reversing depends on the driver's experience!
水泥攪伴車，我自己曾經開過，每天在工地進進出出，而且很多都是倒車的時候比較多，確實存在隱患。
I have driven the cement mixer truck myself. I go in and out of the construction site every day, and many of them are reversing more, which does have hidden dangers.
不只是水泥攪拌車，還有大貨車，掛車翻斗車這些倒車時都看不見后面，倒車時只能憑司機的感覺，就拿水泥攪拌說，后面安個倒車影像幾天就會被水泥糊滿的，現在的科學是發達了，但是倒車影像可有可無的，全憑老司機的多年經驗和感覺。
Not only cement mixers, but also large trucks and trailer dumpers can't see the back when reversing. When reversing, you can only rely on the feeling of the driver. Take cement mixing as an example. Installing a reversing image in the back will be filled with cement in a few days. Now science is developed, but the reversing image is dispensable, which depends on the experience and feeling of the old driver for many years.
