400-880-5646
Ningbo Kaidi Science and Education Instrument Co., Ltd
Contacts：Cai Rong'er
Tel：0574-63325388
Mobile：13505842066
E-mail：391964179@qq.com
Web：www.kdkjyq.com
Add：588 Huancheng West Road, Zhouxiang Town, Cixi City, Zhejiang Province, China
New curriculum standard for bar splicing strips
Score based new curriculum standards
Circular fractional model
Iodine sublimation condensation tube
Demonstration model for deriving calculation formulas for pi and circular area in accordance with the new curriculum standards
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