摇曳的微光
发表于 2025-4-1 05:27:14
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腼腆
发表于 2025-4-1 08:56:13
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同位素
发表于 2025-4-1 11:57:57
Jeremias Gotthelfindustries. In machining, mineral, synthetic and semi-synthetic cutting fluids are widely used but, recently, uses of vegetable based cutting fluids have been increased. Although, these cutting fluids are beneficial in the industries, their uses are being questioned nowadays as regards to health and