Rubber sheeting covered the commander's cupola, the mantlet and the hull machine-gun, but this could be blown away from inside the vehicle by means of an electrical detonator.
The preparation of mantlets, movable shelters, and various implements of war, will take up three whole months; and the piling up of mounds over against the walls will take three months more.
护甲，指挥圆
。
机枪孔，但这种设备容易被吹离
，
，
后成，距堙，又
