Original gas in-place(OGIP)
original in gas-oil ratio
The research on economizing gas in gas - cooker
the concrete piles cast-in-place in the sunken tube
abundant in original fissures
bamboo shoot in original juice
box-beam casting in original position
FISSURE WATER IN ORIGINAL ROCK
original gas-water contact
original place of raw material
Original place reaction
Original-Place Reconstruction
red clay in original structure
original-original seeds with virus-free