地面导线环是变频测深发射天线的一种形式。
The wire loop laid on the ground is one type of antenna for parametric depth sounding.
趣道t WP导线环密绕固定传统技术，使导线环缠绕部位整齐美观而密实牢固。
BONTAO TWP (Traditional wrapping Technique) ensures a regular, neat, tight and secured wrapping for the line guide ring.
陶瓷导线规要便宜一些但是如果别针(或八字环)进入线规时就会裂开或者破损。
Ceramic line guides are less expensive but can crack or break if swivels are reeled through the guide.
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