last weekend,Some users found thatiPhone7 will make a "hissing sound" when the load is high,Many people think that there is a problem with the A10Fusion chip of iPhone7 and 7Plus.Experienced various "doors" of previous generations of iPhone,Many people think there may be a "hiss door" this time.but,"Hissing" is a normal phenomenon.Click to understand "" "?

last weekend,Some users found thatiPhone7 will make a "hissing sound" when the load is high,Many people think that there is a problem with the A10Fusion chip of iPhone7 and 7Plus.Experienced various "doors" of previous generations of iPhone,Many people think there may be a "hiss door" this time.but,"Hissing" is a normal phenomenon.Click to understand "" "?

2019年7月22日，美国陆军红石测试中心（RTC）一架CH-47F“支奴干”直升机吊挂一套橙色的喷淋系统在空中飞行。它并不是在执行农业植保作业，而是在测试吊挂这套人称“橙杆”（orange boom）的特种试验装置后的适航性。“橙杆”的真正名称是“直升机结冰喷淋系统”（Helicopter Icing Spray System/HISS），它可以向后方喷射水雾，在后方营造一片可控的过冷水云，为后方被测试飞机或直升机提供了极为难得的人造结冰环境，保障其能顺利完成结冰试验。从照片判断，这套“橙杆”系统在起飞前成水平状态锁定在直升机后部，起飞后解锁向前下摆成垂直作业姿态。