Signaling system 7 (SS-7 ) replaced the ________ standard in the United States in the mid-1980's
Fill in the blank(s) with correct word
SS-6
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Calcium, sulfur, and magnesium are the three secondary elements in plant nutrition
Indicate whether the statement is true or false.
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For which one of the following types of tungsten electrodes can the electrode tip be balled (spherical)?
A) ceriated B) thoriated C) lanthanated D) zirconiated
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Pocket doors are commonly used when space for a door swing is limited, as in a small room.
Answer the following statement true (T) or false (F)
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Presses and pullers are often required for complete disassembly.
a. true b. false
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