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螺旋 らせん
gen. screw n uk; key (of a clock, watch, etc.); spring (of a clock, watch, etc.)
construct. spiral
given. Rasen
螺旋 ichi1 news2 nf38 | ichi1 news2 nf38 らせん
gen. spiral n adj-no; helix n adj-no
α螺旋
gen. alpha helix n