The message is clear: no rubber stamps, even for renewable energy.

信息很明确：即使是可再生能源也不要留下任何污染痕迹。

Rock textures can be achieved with stamps or rubber skins molded from real rock and hit with a release agent before use to ensure a clean parting of ways between concrete and imprinting tool.

岩石纹理才能实现真正的邮票或岩石模压橡胶皮，用脱模剂打击使用前，以确保混凝土之间的印迹分手清洁工具的方法。