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单词
semseyite
释义
semseyite
[`sem·sē´īt]
MINERALOGY
Pb
9
Sb
8
S
21
A gray to black mineral composed of lead antimony sulfide.
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control chart
control circuit
control code
control column
control computer
control counter
control data
control day
control desk
control diagram
control drive
control echo
control electrode
control element
control feel
control field
control gene
control grid
control-grid bias
control-grid plate transconductance
control group
control head gap
control hierarchy
control hole
control inductor
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