1. 摆动锯：reciprocating pump 往复泵 | reciprocating saw 摆动锯 | recirculate 循环

2. 滑座式锯：reciprocating pump 循环泵 | reciprocating saw 滑座式锯 | recirculation degassing 循环真空脱气法

3. 往复锯：reciprocating rotary piston engine 往复式转子发动机 | reciprocating saw 往复锯 | reciprocating screen 摆动筛

noun

1. a portable power saw with a reciprocating blade
can be used with a variety of blades depending on the application and kind of cut
generally have a plate that rides on the surface that is being cut

Synonym: saber sawjigsaw