国产亚洲精品小视频-麻豆乱婬一区二区三区-综合视频精品这里只有-美女张开腿张开腿让男人捅

Characteristic：

Colorless or yellow transparent liquid with irritating odor and strong acidity; At 390~407 ℃, it decomposes into SnSO₄ , while 407- 425 ℃, it decomposes into SnO.

Application：

It is used for tin electroplating of such products as electronic elements, PCB, IC, lead frame, wire rod and tinplate.

Advantage introduction：

High purity electrolytic tin ingot used as the raw material;

Advanced production process and strict control over quality, contributing to stable product quality;

High tin content, low content of free acid and low content of organic impurities and metal impurities;

Stable bivalent tin, with strong oxidation resistance.

Technical indicators：