由于迄今为止的混凝土浇筑作业必须依靠现场指挥人员通过步话机等通讯工具确认向混凝土拌和厂操作人员发出的指令，所以无论是指挥人员还是林和厂的操作人员，当改变混凝土配合比的时候，他们之Jbl的联系at作量很大。为了减轻作业人员的负担，日本开发出从拌和材料的投放到混凝 As the concrete pouring operation so far has to rely on field commanders to confirm the instructions given to operators of concrete mixers through walkie-talkies and other communication tools, both the commanding officer and the operator of the forest and the factory, when changing the concrete mix, Their Jbl contact at a large amount of work. In order to reduce the burden on workers, Japan has developed from the mixing of materials into the coagulation