spiral ring gauge 螺纹环规
spiral ring structure [天] 旋涡环形构造
triple-spiral ring packing 三头螺旋环填料
double spiral ring 双螺旋环
spiral ring-barking 螺旋环剥
spiral ring-shaped channel 螺旋环形通道
single spiral ring packing 单头螺旋环填料
circular spiral ring packing 圆形螺旋圈填料
triangular spiral ring packing 三角螺旋圈填料
The synthetic method is simple and convenient and direct; and the spiral ring skeleton obtained from spiro-diketone has optical pure chiral ligand with different absolute configurations.
本发明的合成 方法简便直接，从外消旋的螺环二酮出发得到螺环骨架具有不同绝对构型的光 学纯的手性配体。
I stopped to look at Mosh Shternberg’s silver work and bought a spiral-shaped ring that wraps around my ring finger, for the equivalent then of about $37.
我在摩西 希腾堡银器店停下脚步，买了一只螺旋状的戒指戴在无名指上，这只戒指的价值相当于37美元。
A screwdriver is used to remove the spiral seat retainer ring from its groove.
采用一把螺丝刀从凹槽中拆卸螺旋阀座定位器环。
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