Compared with other domestic companies, Linde's products are a very good choice. The answer upstairs is nonsense. There is no secondary thermoplasticity in the FRP receiving cavity. Compared with other manufacturers, Linde's receiving cavity is already the top in China. The adjustment is very convenient. You can go and see it if you need it. A friend of mine installed it there. It's good. Also a calf, you accompany me to climb the mountain.