1.
Synthesis of Spiro-Heterocycle Compounds of Oxazole, Thiazole and Quinoline Derivatives;
含噁唑、噻唑基螺杂环化合物的合成
2.
Studies on the Synthesis of Spiroheterocycles by 1,3-Dipolar Cycloaddition Reaction;
1,3-偶极环加成反应合成螺杂环化合物的研究
3.
Studies on the Synthesis of Spiroheterocycles with a Fused Pyrimidine Ring Unit via 1, 3-Dipolar Cycloaddition Reactions;
1，3-偶极环加成反应合成稠合嘧啶螺杂环化合物
4.
Study on the One-Pot Multicomponent Synthesis of New Spiroheterocyclic Compounds
多组分“一锅煮”合成新型螺杂环化合物方法学研究
5.
a woodscrew having its shank bent into a ring.
螺柄制成环状的木螺丝。
6.
stressed collar
剪力环（螺栓联接）
7.
spring eye bolt
(弹簧的)环端螺栓，弹簧眼螺丝
8.
except the screws and nuts that held the knocker.
只有固定门环的螺丝和螺帽。
9.
inserted nut abrasive discs and inseted nut ring wheels
带螺母砂盘和带螺母环形砂轮
10.
Classification and Function of the Basic Helix-loop-helix Protein Class
螺旋-环-螺旋蛋白家族的分类和功能
11.
large-size precision thread ring and plug gauge
大型精密螺纹环塞规
12.
curled or wound (especially in concentric rings or spirals).
卷曲的（同心环或螺旋线）。
13.
ring with coil-spring expander
螺旋弹簧胀圈活塞环
14.
steel weldless eye nut
钢制整体式环首螺母
15.
recirculating ball and nut steering gear
循环球和螺母式转向器
16.
Synthesis of 1, 4-Dioxaspiro[4.5]decan-8-one;
1，4-二氧杂螺[4.5]癸烷-8-酮的合成
17.
Multi-slice spiral CT diagnosis of complex congenital heart diseases
多层螺旋CT诊断复杂型先天性心脏病
18.
Recycling and purification of 1,4-dioxaspirodecan-8-one
1,4-二氧杂螺[4.5]癸烷-8-酮的回收与提纯