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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯
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網球拍線張力測試器ERT 300(開箱)
+ g- m" w" _& y, R3 |ERT 300 Manual
! z6 i% }- ]* C0 m5 ?The right tension for every type of player) q1 a6 L# H( R/ H( Q, |# K( r
3 |1 F, }# C, K0 aDynamic Tension DT ( DT-value) / DT is the string bed stiffness& Y: e1 q3 _0 T+ F" e$ d9 ]/ p
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
' J% d+ G( Y. Q% I }) X+ m1 LDT determines the playing characteristics power and control.! j9 q# N1 u) b* [$ U/ N; x8 o
Higher DT for more control / Lower DT for more power: U& u1 K( o" R8 ?
Not recommended to play tennis when DT below 28
8 s* t- j/ s3 y" uRestring the racquet when the DT-value has decreased by 10% to 20%: D: S H5 w/ N' G% O! r J C
" J) A4 h: M8 m( \2 A' N5 B* OLo DT 28-34 Defensive play / Club
0 h6 {1 }4 G# s& \2 W( }Mid DT 35-41 Dynamic,offensive play / Club,WTA
: }/ x# p# Q/ ]Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP; `$ M* q% y: G/ F, H ^
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP
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Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.4 s* ^6 J O% H. o) O5 P, f
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在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.- z* a; ?0 X, V
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發表於 2011-6-30 11:21:01
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