| 摘要 |
Subject: hydraulic rotor-equipped system for the placing and display of advertising messagesConstitution: a telescopically-folding rod 1 assisting the placing and display of advertising messages, an externally-threaded plastic cap 9 firmly-adapted to the lower end of the foregoing rod 1 whereon there is adapted an advertising surface 2 having at one end the sleeve 7 wherein there is inserted the advertising rod 1 secured by the metal clamp 8, the rotor 3 formed by junction of two ordinary metal screws: the upper screw 11 being smaller in length and diameter than the lower screw 12 the head 13 of which has a bore 14 with thread 15 receiving the body of the upper screw 11 being previously inserted into the plastic cylinder 16 furnished with a hole encountered in the centre and lengthwise its shaft and featuring a cross section which is slightly greater than that of the body of the upper screw 11. |
