| 摘要 |
<p>Concrete screed means for discharging and screeding of wet mix concrete into a series of aligned moulds for the moulding of concrete sleepers having a hopper with two side walls a front wall and a rear wall but not base, a rearwardly extending flow guide plate having a vibrator secured to it but there being no vibrator on either of the side walls, and resilient means joining the flow guide plate to the rear wall of the hopper so that vibration of the guide plate is not transmitted to the remainder of the hopper.</p> |
