多触点开关

multi-purpose dry chemical fire extinguisher

adjustable multi-spindle bench drilling machines【机】

Multi-acid Chemistry

multi-position starter, manually-operated

differential pump (multistage pump, multi-cellular pump, step piston pump)

multi-functional box-type solar cooker

co-ordinate-type multi-position switch (ganged cross bar switch)

pulse generator using multi-aperture magnetic cores