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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 9 z6 x9 W6 d" }! n
# |$ Q# e; P2 V/ D$ x網球拍線張力測試器ERT 300(開箱)% f0 y! g" c' V3 f6 g: I: S A- b
ERT 300 Manual
0 { K: u5 F7 E) O( lThe right tension for every type of player
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Dynamic Tension DT ( DT-value) / DT is the string bed stiffness
) P6 a( m6 g" I5 e+ z. FDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact) m. u. t5 N0 o J# z: @0 {
DT determines the playing characteristics power and control.
7 F1 _+ Z- p. d. Q) ZHigher DT for more control / Lower DT for more power
- {- q; S# s Q, N- n; o9 vNot recommended to play tennis when DT below 28! Q6 \8 a/ r( F; {- C0 b
Restring the racquet when the DT-value has decreased by 10% to 20%
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8 O7 k& q6 e- }8 sLo DT 28-34 Defensive play / Club
' a( ~4 [* |# d7 B9 YMid DT 35-41 Dynamic,offensive play / Club,WTA
# c C6 ~, S1 @Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP1 u$ ?/ {& p& N1 y. i2 q
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP
& r! }, b( Y j1 P, Y* ]6 _0 w4 b* l! m6 o7 w. ^7 c, h5 X
Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.
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* ~8 M1 D# y# p8 T- B) W1 D在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.
1 F; m6 x J" N) n. V0 @ J- ~" n5 P6 a( X2 b
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發表於 2011-6-30 11:21:01
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