標題: ERT-300 / 張力計 [列印本頁] 作者: henrylin424 時間: 2011-6-30 11:21 標題: ERT-300 / 張力計 本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 & H0 e" a7 u' P/ h* G! f" P: n; k% \+ c; {! Y. ?& i. w 網球拍線張力測試器ERT 300(開箱)" X' t( c9 a* n, s* @; V ERT 300 Manual + I# m' f8 z% D6 @0 Z( f$ f The right tension for every type of player8 M. b$ i% t. ~) N- x' B" |1 g& r" S
0 U; N8 V, r$ i9 D, rDynamic Tension DT ( DT-value) / DT is the string bed stiffness: W/ Y' U# j. l& n4 V
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact) / I8 `# o* B' D/ \& @DT determines the playing characteristics power and control.' y9 t7 b! D: }6 i+ M/ @
Higher DT for more control / Lower DT for more power9 _; |& i# F6 F* D3 k: \) e% P
Not recommended to play tennis when DT below 28 / X" i; H( a8 dRestring the racquet when the DT-value has decreased by 10% to 20% 9 J8 }* q- @7 T, B- o4 B; u/ E0 N! H; [5 L. W
Lo DT 28-34 Defensive play / Club, O' Z: B1 P" Y; r
Mid DT 35-41 Dynamic,offensive play / Club,WTA $ L# n, @! U5 f8 Z! T% dHi DT 42-46 Fast,aggressive play / Club , WTA , ATP& R) O: R0 q+ l7 `3 C' f8 ?
Hi+ DT 47-54 Very fast,extremely aggressive play / ATP R9 H7 q$ F. G0 H* M
/ h3 t. [' p# uWithin the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.7 d; \; s1 m( c6 o2 M/ e6 z$ _' |. a
5 L! q6 K' j: B8 n. f' `在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.1 x( ~5 x6 }6 f9 i4 w# Z
! p! b+ P' ~- C* l$ I* S 作者: henrylin424 時間: 2011-8-21 10:56 回復 henrylin424 的帖子4 I5 @$ i& p7 |5 f
# w& J5 d4 n3 B& H/ e! _ Gamma ATS ERT 300 Tenniscomputer a; k% D L. V( ~5 E% |
TW上售價169美金,海外運費36美金6 U0 Y; F7 X0 U* O+ L' i. }/ E