( I. e9 X$ ~! W# Z3 U, A網球拍線張力測試器ERT 300(開箱) ) x( O2 [2 V5 w: v, Y8 h8 YERT 300 Manual ' I) W5 z+ N0 d `6 K. {3 M/ jThe right tension for every type of player * W0 N. J9 h3 g1 D2 I " Y6 R1 r" Q9 R; M) u- vDynamic Tension DT ( DT-value) / DT is the string bed stiffness& p9 R7 d9 q- o& A2 T) T+ n. a
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact) : ]4 g6 G7 w, x/ X" P% |1 XDT determines the playing characteristics power and control.2 e4 j$ @ N% D
Higher DT for more control / Lower DT for more power . ?" m0 a9 B, L6 gNot recommended to play tennis when DT below 28( F/ D& I& Z- N
Restring the racquet when the DT-value has decreased by 10% to 20%) l% p7 N+ C! Q
- q8 n0 `/ h+ M) L7 V! x6 y* m. SLo DT 28-34 Defensive play / Club ( p3 U2 F9 q+ q% e$ _+ oMid DT 35-41 Dynamic,offensive play / Club,WTA , \% l/ b" `, j& Q' g* D* ~; tHi DT 42-46 Fast,aggressive play / Club , WTA , ATP. Z" W6 }' n9 y) }9 v! F
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP. {4 j u. `9 X/ p; `
6 y: F" i1 s1 V# F+ TWithin the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses. " @1 ?* q5 O5 a# P8 H$ y* l& k Z3 Q+ }' J/ P! K$ m
在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart. 0 ?/ W* }% T" c" \" ]- w& k) y& x* A$ L* x l" w% b2 A 作者: henrylin424 時間: 2011-8-21 10:56 回復 henrylin424 的帖子 . h8 {$ c5 d9 Y7 X& s$ r c 2 r; n: p B0 p7 v, z5 ~. V$ d' \' bGamma ATS ERT 300 Tenniscomputer$ O7 u4 d1 y2 i: [: b, S
TW上售價169美金,海外運費36美金" J0 i3 G' F* j. a3 i