[quote=小小ham]发现时键钮不见了，从一个坏了的常熟键上拆下了一个坏的键钮装了上去……[/quote]
按型号看应该是这样的！
hk-705 straight key "little brother" of the famous hk-708, the model hk-705 is smaller, lighter, and less expensive. the design is virtually identical to the 708, but the 705 is only 5" inches long by 2-3/8" wide and weighs a mere 4.25 oz. since it has the same "knob-over-base" design as the 708, you can place it on your desk and use it without screwing it down or holding it. perfect for mobile and portable operation, it's large enough that you can use it comfortably, but small enough to fit in a pocket.
但看底座似乎是hm-hk704 或者 hm-hk709的底座！
