ring form coil 环形线圈
coil form [电] 线圈管 ; 线圈型
form wound coil 成型线圈
form-wound coil [电] 模绕线圈
coil form wound 模绕线圈
tinplate in coil form 卷带镀锡板
Rolled up in the form of a coil with the tip in the center as an unexpanded fern frond .
拳卷的，旋卷的卷成线圈样式，其尖端在中间的，如未展开的蕨叶的。
For metal material, give the form of the material, e. g. steel coil, rod.
对于金属材料，请给出材料形态，比如金属板材，金属线材。
About the supply voltage, frequency, capacity factor of the fan and motor, specification of coil pipe, kinds of humidifier, form and efficiency of air filter, caliber and direction of pipe and etc.
对风机及电动机的电源电压、频率、功率，盘管规格，加湿器种类，空气过滤器形式及效率，配管口径及方向等有要求时请注明；
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