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- Ni系催化剂Ni catalyst
- 系system
- La-Mg-Ni系La-Mg-Ni system
- Ti－Ni系贮氢电极Hydrogen-Absorbing Electrodes of Ti-Ni
- 铌系催化剂niobium series catalyst
- La-Mg-Ni系电极合金La-Mg-Ni system electrode alloy
- 铁铬系催化剂iron-chromium catalyst
- La-Mg-Ni系合金电极La-Mg-Ni system alloy electrodes
- 院系department
- 系上to buckle up
- 系带chalaza
- RE-Mg-Ni系储氢合金RE - Mg - Ni hydrogen storage alloys
- 中文系department of Chinese language and literature
- 菜系style of cooking
- 系的phyletic
- 科系department
- 高能球磨纳米Co系催化剂粉末的微观应力MICRO STRESS FOR NANO Co CATALYST FINES BY HIGH ENERGY BALL MILLING
- 系动词copula
- 全系holophyly
- 外语系department of foreign languages
