(Exercises 4 to 7 in Advanced
Copyediting Practice for Chinese Technical Writers
by Ted Knoy)
[ Exercise 4]
number of innovative developments ( has , have
) been made in the Multi-component injection molding
process in recent years.
gas channel design that ( guides , guide ) the
gas flow to the desired locations ( is , are )
one of the key factors that determine a successful
delay time along with gas injection points ( is
, are ) important in producing injection-molded
parts of quality.
the processing parameters nor the amount of polymer
melt injection solely ( determine , determines
) a successful gas channel design.
select the number and locations of gas injection
points and to determine the amount of polymer
melt injection ( is , are ) essential to a successful
( aim , aims ) to integrate worker comfort and
of the factors ( contribute , contributes ) to
a successful design.
simulation in which the polymer melt flow ( occurs
, occur ) in thin cavities ( provides , provide
) accurate predictions.
a general model or empirical formula in addition
to describing the thickness variation of the skin
melt that exists between the gas/melt interface
and the cavity wall ( appear , appears ) to be
necessary for further development.
number of gas injection points ( are , is ) important
in producing quality injection-molded parts.
majority of factors heavily ( influences , influence
) product performance.
determining the interface shape of a bubble nose
and properly selecting the film thickness ( is
, are ) of primary concern.