TY  - Data
T1  - Patents on design and development of key equipment and tools for polar drilling
A1  - chi shenggao
DO  - 10.12072/ncdc.SRIPE.db1695.2022
PY  - 2022
DA  - 2022-02-25
PB  - National Cryosphere Desert Data Center
AB  - Five patents were applied in Wuhan, Hubei Province from 2017 to 2020, including screw drill anti dropping technology, PDC bit, diamond composite, rubber formula, etc.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/3946a3c1-059e-40d8-88f0-70ab8543084f
ER  -