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The second step is to pour at least one hundred millilitre and preferably two hundred and fifty millilitre of water glass into the thermal insulation foam outside the two copper pipes, and slowly carry out the process several times in a small amount。BestCities Global Alliance董事总经理Jane Vong Holmes表示:“在最近庆祝了作为世界上唯一的认证会议局联盟10多年之后,董事会审视了我们已经取得的成就以及我们在未来十年的目标,并认为专门的公共关系机构的协助对于实现我们的目标至关重要。co。