There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles.
HVAC technicians are responsible for the installation, maintenance and repair of heating, ventilation and air conditioning (HVAC) systems. As an HVAC technician, your job duties may include inspecting existing systems and making recommendations intended to improve the efficiency and/or safety of that system's performance. HVAC-R techs may also work on refrigeration systems.
The car mechanic job includes the overhauls, repairs, and servicing of automobiles and similar motor vehicles: (i) plans work using technical manuals; (ii) examines vehicle to determine extent and location of mechanical/electrical defects; (iii) repairs or replaces parts such as pistons, gears, spark plugs, etc; (iv) checks on condition of tyres, ...