He is able to identify that specific spot by reference to the divot hole which his previous stroke made.
2
皇星打胶枪,手柄设计在中间打胶、方便轻巧、不打胶时杆可前自由拉动、操作简单。
The handle of Huangxing glue squeezing gun was design in the middle, it is convenient and smart. It is easy to operate. And the plank can move towards freely when stop squeezing.