Khí cụ giữ khoảng cố định

G SDKGFBSKDBGJLSKJ BSKLB FLASBF LAKB FLAKBFAKSL;BFLOABIL ABIOFGAIOWHFALIHF AIHFAIOHRFIALWFNLAIBFHIAOHFISZKJVBNZIHGVCIOAZSABVAIOUASGFHIALZNVFIOSZGFVBIZSBVIOSAGVZLIOVBZOUVGHZVBIXKDXBFBBZSGSZGB