求翻译：多功能水浴恒温振荡器具备回旋和往复两种功能，当需要选择不同的振荡方式时， 将开关拨向回旋或往复。是什么意思？

Multifunctional water bath and the oscillator swing back and forth with two functions, when the need to select a different oscillation mode, or will switch to swing back and forth.

Multi-functional water bath thermostatic oscillators with swing and reciprocating two functions, when there is a need to select a different oscillator will be allocated to switch swing or reciprocating.

The multi-purpose water bath constant temperature oscillator has revolves and moves back and forth two kind of functions, when needs to choose the different mode of oscillation, dials the switch to the maneuver or the reciprocation.

Multifunctional and reciprocating water bath oscillator roundabout two features, when you need to select the different modes of oscillation, will switch to maneuver or reciprocating.