这种新枪炮都加有来复线。

Such new arms are rifled.

youdao

在有来复线的或其它的管壁皱纹的管中，由于引起副流，可能将非均质流转变为均质流。

Rifled or other pipe wall corrugation may change the flow from a hetero-generous to a homogeneous regime by introducing a secondary circulation.

youdao

人们将来复线（膛线）引入枪管之后提高了射击的精确度。但是装弹和清膛仍然很麻烦。

The introduction of rifling, or cutting grooves, into a barrel had already improved accuracy, but the weapons remained difficult to load and clean.

youdao

人们将来复线（膛线）引入枪管之后提高了射击的精确度。但是装弹和清膛仍然很麻烦。

The introduction of rifling, or cutting grooves, into a barrel had already improved accuracy, but the weapons remained difficult to load and clean.

youdao