Question

Define the upstroke and downstroke​

Answer 1

Answer:

downstroke(Noun) A downward stroke, especially one that is part of a sequence of alternating upward and downward strokes

Upstroke is a mechanism which helps to raise the plunger and downstroke helps to help lower the plunger. On the up-stroke of the plunger, the lower valve opens and the upper valve is closed. ... Whereas, on the downstroke, the lower valve closes and the upper one opens.

Answer 2

Answer:

Upstroke:

An upward stroke, especially the stroke, or line, made by a writing instrument when moving upward, or from the body of the writer, or a line corresponding to the part of a letter thus made.

Downstroke:

A downward stroke, especially one that is part of a sequence of alternating upward and downward strokes.

Explanation:

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