国模吧无码一区二区三区_夜色福利院在线观看试看_亚洲 欧美 偷拍 丝袜 清纯_91久久精品一区

Inspection standard: HG/T3252-2000
ITEM	STANDARD	ANALYSIS
Na2SiF6%>=	98.5	99.2
Loss of weight on drying at 105 centigrade %<=	0.40	0.08
free acid(HCl)%<=	0.15	0.02
fineness(through 250um sieve)%>=	90	90
water insouble matter%<=	1.0	0.54
iron(Fe)%	/	/
Remark
Result: this lot conform with HG/T3252-2000 standard