这些螺钉是公制的.These screws are metric , ie have been measured in fractions of a metre.千米,公里公制的长度单位,等于1, 000米 ( 0.62英里 )A metric unit of length equal to 1, 000 meters ( 0.62 mile ).告诉电器的电压降超过距离, 都为AWG的和公制的电缆.Tells electrical v...
The workmen are still busy concreting the road.工人们仍忙着用混凝土铺路。Anchor concreting is an effective support technique to control surrounding rock deformation and keep tunnel stability.锚杆注浆是一种行之有效的控制围岩变形和保证巷道稳定的支护技术.The workman...