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• 2023年3月21日 (二) 16:00 Lukegao1 讨论 贡献创建了页面How to Add Concrete to Existing Concrete （创建页面，内容为“Adding new concrete to existing concrete can be done in several ways depending on the situation and the purpose of the project. Here are some steps to follow: 1. Clean the existing concrete surface thoroughly. Use a pressure washer or a scrub brush to remove any dirt, debris, or loose material. Allow the surface to dry completely. 2. If the existing concrete surface is smooth, use a chipping hammer or a grinder to roughen it up. This will help the new concret…”）