渗化度 写在测试纸上的线条在特定的条件下放置后用测微镜观察到的线条向纸张纤维渗开的程度
The degree of penetration is the degree to which the lines written on the test paper seep into the paper fibers after being placed under specific conditions and observed with a micrometer
以上为机器翻译结果，长、整句建议使用 人工翻译 。