Shandong bailian machine tool sales co., LTD., the main CNC machine tools, milling machine, grinding machine, machine to...
电焊时可产生大量的电焊气溶胶，其成分与使用的焊条成分有关，主要是氧化铁，其次为氧化硅、氧化锰以及氟化物。电焊烟尘对健康的危害主要是引起呼吸系统粘膜刺激、炎症、电焊工尘肺和中毒。
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中毒作用主要与使用的焊条成分有关，如使用高锰型焊条，产...
Based in ShenZhen which is a twin city of Hong Kong, ROC International(ROC-Int) Electric Co., Ltd, one the largest tradi...
Thunder Precision Resistor Co., Ltd is an experienced professional manufacturer of high precision resistors and ultra h...
Dongguan City Yongmao Industrial Investment Co., Ltd., established in 1998, specializing in researching, producing and d...
Jewellery has been an integral part of every woman's appearance. Bright, sparkling jewellery accentuate a woman's beau...
