What is one purpose of shutoff valves to a compressor during installation and when servicing an ax?

Is mineral oil good for swimmer's ear? Can you tell you how far along you are by my blood test hormones being 152? What causes low cortisone levels? Why do people stress about weight? Can you fracture your charlie horse? How would you respond to the accused suspects denial of having the blood type you identified since he has proof that he had just received a blood transfusion with type o blood? What could be a small hard lump directly in front of a tongue piercing that is a few years old? Does cartilage grow appositionally and interstitially? What is the working alliance in counseling? How do different types of cancer respond to treatment? What does the word douch mean? Why mumps or another high fever disorder can result in sterility in adult males but not in women or children? Will alcohol clear a bladder infection? Is chlorine the gas used by white blood cells to kill bacteria? Why your one foot is swollen for five months and it not even hurt but it does not fit into your summer shoes? What causes dry palms? Is it normal to have brown spotting while 17 week pregnant-almost three weeks after you had a cervical cerclage which is an operation where they stitch the cervix to prevent miscarriage? What caveat governs use of laser technolpogy in treatment of spider veins? Why cant women be color blind? What causes shock like symptons in your legs?