She was spinning white flaxen thread, which ran from her spinning wheel down to a pile around her feet, then on down the slope, like a creek.
她正在纺着白色的亚麻线，线从她的纺轮里跑出来，在她的脚边堆成一堆，然后跑下雪泥地，像一条小溪。
There are such types of pile combs as silver-mercury, thread compound, mould metal, combination. The thesis also discusses the making and the clinical application.
介绍了银汞合金桩核、螺纹桩复合树脂桩核、铸造金属桩核、组合式桩核的制作方法和临床应用。
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