细纹锉
You have to file away for hours to get this metal smooth.
你得锉上几个小时才能使这金属变得光滑.
The diffusion distances of resinous liquid in dentin at the introduced time of 30, 60 and 90s with file, smooth broach and cotton reservoir were investigated in the in vitro experiments.
对塑化液采用不同导入时间(30、60、90s),不同导入方法(锉,光滑髓针,棉捻)在牙本质内扩散距离的影响进行了离体牙实验。
I can file It'smooth.
我可以把它锉平.
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