发布时间:2025-02-09 04:56:56
卫生纸原纸的种类繁多,主要根据原材料的不同,可以分为甘蔗浆、竹浆、木浆等。此外,原纸的克重大小以及造纸工艺的不同,还可以区分为喷浆纸和挂浆纸等。
ppr管材料具体规格参数如壁厚强度等级de与钢管dn的转换内丝直接外丝直接型号解释
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