There are thousands of pieces of debris floating around in orbit, bits of old satellite or rocket even tools dropped in the past by space-walking astronauts.
有成千上万枚碎片在围绕轨道运动，可能是老旧的卫星，火箭，甚至过去进行太空漫步的宇航员遗落的工具。
A mechanical floating is used because of instrument, water quality and down hole tools that make in-correct result measured or instrument blocked down hole.
使用机械浮子井下流量计经常因仪器、水质、井下工具等问题，造成测试资料不准或因卡住仪器而修井。
Sterilization function of chlorine dioxide to the leaf-cutting tools in tobacco floating-seedling system was studied.
对二氧化氯在烟草漂浮育苗中剪叶工具的消毒效果进行了研究。
Sterilization function of chlorine dioxide to the leaf-cutting tools in tobacco floating-seedling system was studied.
对二氧化氯在烟草漂浮育苗中剪叶工具的消毒效果进行了研究。
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