Mechanic 
To dream of a mechanic indicates that you are nursing old emotional wounds that should be tended to. You need to move on in your life.
Threshing
To dream about threshing grain symbolizes progress in commerce and familial happiness.
Washboard
The washboard is symbolic of embarrassment. Some event in your waking life has caused you great distress and embarrassment. Because of this, you are exhausted, physically and emotionally. If the washboard itself is broken, your life, once viewed as so exciting, has become too much for you, too fast. It has brought you nothing but disgrace. You need to slow down.
Watermill
To dream of a watermill is a reminder that you always have options. By carefully considering a particular problem from each angle, you may find a new solution. The watermill may also serve as a reminder that slow and steady progress towards your goals is the best course of action.
Appliance
Dreaming of appliances indicates a desire to settle down and establish your own domestic space. A dream in which you are using an appliance may be a sign that you have become overly reliant on someone but have failed to show your appreciation.
Generator
To see a generator in your dream indicates an independent source of physical motivation and also the ability for creation with no help from outside influences.
Lawn Mower
To dream of a lawn mower suggests the need to redirect your negative thoughts into something more acceptable and productive. You need to tame yourself and guard against provocation and exposure to situations that might cause you to lose your temper.
Typewriter
To dream of a typewriter indicates that you need to work on enhancing your ability to communicate with others.
Laundromat
A laundromat in a dream symbolizes a need to air dirty laundry. You may feel a desire to open up to others as well as a desire for others to open up to you.
Instruments
Musical instruments in a dream represent harmony. Technical instruments are symbols of your work or an emotional state which you associate with those tasks.