An inch is about the length of the top knuckle of a thumb, while a centimeter is about the size of the fingernail of your pinkie finger (little finger at...
Start by practicing your toss. Ensure that your toss is consistently going up to a comfortable height straight above your head. Then, let it drop slightly lower than your regular...
If you are referring to a mechanical seal, then I usually find that if you phone the pump manufacturers and ask nicely, they will usually send out some information to...