| 摘要 |
<p>The receptacle(2) holding the components consists of a flexible material and its volume percentage is less than 15 per cent of the overall volume of the mortar mixer(1). The volume percentage of the cement(6,8) comes to approximately 15 - 60 per cent, and that of the filling material(7) comes to 35 - 70 per cent of the overall volume of the mortar mixer. The filling substances are coarse disperse materials which are inert compared with the cement, and have a Mohs hardness of more than 4 and a density which is more than, or equal, to 2 grams per cubic centimetre.</p> |
