a marine bivalve mollusc which has a somewhat triangular shell
楔形贝。
n. 楔形贝
The application of the rotational graded wedge mechanism in a flanging die for the shell plate metal sheets greatly raises the production efficiency.
将双向运动斜楔与旋转斜楔进行了对比,在侧围板外覆盖件翻边模具中采用旋转斜楔成形机构,大大提高了生产效率。
a marine bivalve mollusc which has a somewhat triangular shell
楔形贝。