It should be of such length that, when the lower end is resting on the table or other surface supporting the coilbase, the top end will be flush with the upper end of the spool.
它应该是这样的长度，当低端是在桌子上或支持其他表面线圈基地休息，高端产品将随着阀芯上端对齐。
2
At least one preformed coil is used to attach the first end of the base fabric to the second end.
至少一种预成形线圈用来将该基底织物的第一端连接至第二端。
3
Secret of the Flashlight bulb With the coil held snugly against the socket, and the bulb in place, dip the wire and base into melted paraffin, covering everything but the glass bulb.