塑料制品上,三角形里的数字各代表什么意思?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 21:29:52
![塑料制品上,三角形里的数字各代表什么意思?](/uploads/image/z/939389-5-9.jpg?t=%E5%A1%91%E6%96%99%E5%88%B6%E5%93%81%E4%B8%8A%2C%E4%B8%89%E8%A7%92%E5%BD%A2%E9%87%8C%E7%9A%84%E6%95%B0%E5%AD%97%E5%90%84%E4%BB%A3%E8%A1%A8%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%3F)
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