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caracteristics
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Unplasticized
polyvinyl chloride
pipes
and
fittings
.
Assembly
by
sealing
rings
for
pressure
pipelines
.
Dimensional
caracteristics
.
装配有压力管用密封圈的未增塑聚氯乙烯管和接头.尺寸特性
GRAPH
FOR PLOTTING THE
CARACTERISTICS
OF
VIBRATION
GENERATOR
SYSTEMS
.
振动发生器组件.特性曲线轨迹图表
Testing
of
lubricants
;
testing
in
the
Shell
four
-
ball
tester
, determination of
wearing
caracteristics
of
liquid
润滑剂检验.用壳牌公司的四球仪检验.液体润滑剂磨损特性值