bi·fi·lar /(ˌ)baɪˈfaɪlɚ/
雙線的
bifilar
雙股的
Bi·fi·lar a. Two-threaded; involving the use of two threads; as, bifilar suspension; a bifilar balance.
Bifilar micrometer (often called a bifilar), an instrument form measuring minute distances or angles by means of two very minute threads (usually spider lines), one of which, at least, is movable; -- more commonly called a filar micrometer.
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bifilar
adj : having or using two filaments; "a bifilar suspension of a
waving part of an instrument"