A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a keyhole auxiliary tool which comprises a shell. The keyhole auxiliary tool is characterized in that the shell is provided with an opening which is corresponding to the position of a keyhole; an open port is formed in the shell; the open port is connected with a guide groove; the guide groove is communicated with the opening; a rotating piece is arranged on the opening; and a slot is formed in the rotating piece and is communicated with the guide groove. The keyhole auxiliary tool has the beneficial effects of being simple in structure, convenient in use and capable of guiding a key into the keyhole smoothly in the conditions with insufficient light or with total darkness.
The invention discloses a keyhole auxiliary tool which comprises a shell. The keyhole auxiliary tool is characterized in that the shell is provided with an opening which is corresponding to the position of a keyhole; an open port is formed in the shell; the open port is connected with a guide groove; the guide groove is communicated with the opening; a rotating piece is arranged on the opening; and a slot is formed in the rotating piece and is communicated with the guide groove. The keyhole auxiliary tool has the beneficial effects of being simple in structure, convenient in use and capable of guiding a key into the keyhole smoothly in the conditions with insufficient light or with total darkness.
| British Library Online Contents | 1999
Keyhole Technology Pavement Restoration
| British Library Conference Proceedings | 1998