| 摘要 |
For the purpose of sucking excess water out of molds, there are provided two settling containers (1A, 1B) operating alternately under a vacuum, each combined with its own inlet valves (8; 10), suction valves (7, 9) and discharge valves (11, 13); means (12) for simultaneously operating the said valves to switch the identical valves into the two different states, so that, in an alternating way, one container is brought into the suction state and the other into the discharge state. <IMAGE>
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