hardness ions 中文意思是什麼
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Effect of sorts of implanted ions on surface nano - hardness improvement of nylon 6 and its mechanism
注入離子種類對尼龍6表面納米硬度的影響及機理分析 -
The source of hardness of water is the existence of dissolved calcium, magnesium and other metallic ions, which is harmless to humans
水中存在溶解之鈣鎂等金屬離子物質為硬度來源,對健康無影響。
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