Special worm gear hobs with circular tooth, double pitch and involute etc, can also be ordered.

圆弧齿、双螺距、渐开线等特殊蜗轮滚刀也可以订货。

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The diagonal double pitch curved lattice grid system is used in the country for the first time.

斜拉双坡曲面钢网壳结构体系，为国内首次采用。

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Based on the pitch meshing theory of the worm drive, a new structure of the cylinder worm drive-the double pitch point and double side-placed worm gear drive is proposed in this paper.

以蜗杆啮合节点理论为基础提出一种圆柱蜗杆传动的新结构—双节点侧置双蜗轮传动；

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"I didn't feel as good as the last game, but (I was) still making some pitches until the last inning: first pitch double, then a good bunt, " Buehrle said.

WSJ: Blue Jays' Buehrle loses to Yankees again, 5-0

Robinson Cano had a one-out double and Kevin Youkilis was hit by a pitch before Hafner hit an RBI double to left.

WSJ: Pettitte earns win as Yankees beat Blue Jays 9-4

Luetge followed Danny Farquhar out of the Seattle bullpen during the Angels' four-run sixth, giving up Trout's three-run double on his first pitch.

NPR: Trout Hits For Cycle, Drives In 5, Angels Rout M's