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第二鎢鑛機選車間機選廠所設計的4吋S.P.N臥式的砂泵,轉速爲963/分,揚程爲36.4(立幵)/秒。但最初試車時發現砂泵揚鑛總是間斷堵塞或是完全揚不上鑛液,以致造成生產停頓,因而大部分工人的勞動時間都化費在排水打砂上。機選廠爲了要早日投入生產,領導上就針對着這個關鍵問題,廣泛地徵求職工與技術人員的意見,並召開技術人員和老工人的座談會進行研究,當時大家一致認為主要原因是因爲進口口徑堵塞而間斷,因此就着重地圍繞解决這一問題進行試驗。
The second tungsten ore machine workshop design plant selected 4-inch S.P.N horizontal sand pump, speed of 963 / min, head to 36.4 (stand open) / second. However, during the initial test, it was found that the sand pumps were always blocked intermittently or completely out of liquid ore, causing the production to stop. As a result, most of the workers spent their time in draining the sand. In order to put the plant into production as soon as possible, the leadership chose to solicit the opinions of workers and technicians extensively on the basis of this key issue and held a seminar of technicians and old workers to conduct research. At that time, it was agreed that the main reason was that the import Caliber blocked and intermittent, so focused on solving this problem to test.