You have said she has a gravid spot (not gravel). That indicates
that she is gravid (pregnant). She would not have that spot is she
was not gravid. Be patient. Provided she is in suitable conditions
she will have her youngsters eventually.
You have said she has a gravid spot (not gravel). That indicates
that she is gravid (pregnant). She would not have that spot is she
was not gravid. Be patient. Provided she is in suitable conditions
she will have her youngsters eventually.
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she will become egg bound until she finds a suitable spot to lay
her eggs and her behavior will change dramatically
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The most obvious reasons are that spot welding is economically advantageous over other processes, it is very suitable for assembly of sheet-metal components, and it is fast and is easy to automate
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The end of the paper nearest the spot is allowed to be in contact with a suitable solvent, WITHOUT immersing the spot itself. If the spots were immersed they would dissolve in the solvent and be pulled down into the solvent itself.